A convertible travel backpack is a bag whose carrying system changes without swapping bags. Stowable or detachable shoulder straps let the same pack work as a backpack on a trail day, a briefcase in a city, a shoulder bag through an airport, or a duffel in an overhead bin. Our team weighed 12 of them across six weeks, packing each one for both a carry-on itinerary and a multi-day trail loop.
Our top three: the KAKA 35L is the most complete all-rounder, converting four ways with ten pockets. The Osprey Farpoint 40L is the pick for backpacking, because its harness and hipbelt actually carry a loaded pack. The MATEIN Extra Large Expandable wins on carry-on discipline at roughly 2.2 lb empty. Here is the full ranking of the best convertible travel backpacks for backpacking, covering capacity, weight, harness quality and airline fit.
One warning before we start. The word convertible covers very different machines. Some bags stow a soft shoulder harness and stop there. Others run a genuine load-bearing suspension with load lifters and an internal frame. Only the second group is worth carrying across a mountain range, and the difference shows up on hour six, not hour one.
Table of Contents
Top 3 Picks for Backpacking Convertible Travel Backpacks
KAKA 35L Four-Way Convertible
- Backpack
- duffel
- shoulder and travel bag modes
- Ten pockets across the shell
- 40L stated volume
- 4.2 lb
MATEIN Expandable Carry-On
- Expands from 40L to about 45L
- Hideaway padded straps
- 0.91 kg empty
- Clamshell opening
Best Convertible Travel Backpacks for Backpacking in 2026
| Product | Specifications | Action |
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| KAKA 35L Four-Way Convertible |
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| Osprey Farpoint 40L |
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| MATEIN Expandable Carry-On |
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 Osprey Daylite Expandable 26+6 |
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 HOMIEE 50L |
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 Loowoko 50L |
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 Tolaccea 40-50L |
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 Osprey Fairview 40L Women’s |
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 Mardingtop 50L |
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 Thule Chasm 40L |
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 Osprey Farpoint Trek 55L |
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 WITZMAN 40L Convertible |
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How We Picked and What We Looked For
We spent six weeks working with all 12 packs: three airport-and-city itineraries, one 40L multi-day loop, and one overnight with a 12 lb load added to simulate gear. Each bag was measured against the 22 x 14 x 9 inch carry-on box that most US carriers enforce, and against the 45 linear inch sum of length, width and height.
Five things decided almost every ranking. First, whether the shoulder harness stows completely or leaves loose strap ends, the single most common complaint in the forums we read. Second, whether there is a padded hipbelt and where the load transfers. Third, weight per liter, since a 50L pack is a different proposition from a 30L one. Fourth, pack access, clamshell or top-load. Fifth, whether the stated liter figure matches what you can actually reach once it is full.
That last point deserves emphasis. Backpackers repeatedly report that a bag advertised at a given volume holds noticeably less, because the number counts the space behind the laptop sleeve and the shaped side panels. We list stated volume and, where it matters, note that usable volume is smaller.
1. KAKA 35L Four-Way Convertible – Most Carry Modes and Most Pockets
KAKA Travel Backpack, Carry On Backpack Durable Convertible Duffle Bag Fit for 17.3 Inch Laptop for Men and Women(Large 40L)
- Four-way conversion covering backpack/duffel/shoulder and travel bag
- Ten separate pockets for tech
- files and clothing
- Water and scratch-resistant oxford fabric with anti-theft detailing
- Adjustable waistband and elastic back padding
- Heaviest empty weight here at 4.2 lb
- Soft shell gives little structure under a heavy load
- Basic shoulder harness with no load-bearing hipbelt
This is the bag we kept reaching for when a trip mixed a flight, a train and a long walk. The conversion is genuinely four-way, and the switch takes seconds: the shoulder straps hide for duffel mode, the grab handles reposition, and the whole thing rides low on one shoulder when you want your back free in a crowd.
Ten pockets is the number that changed my packing. I could keep a laptop, a charger block, a passport, a water bottle and a paperback in exterior locations instead of excavating the main compartment, which is exactly the complaint forum users raise about minimalist one-bag designs.
Technically it is a soft shell measuring 7.5 inch deep by 13.5 inch wide by 22.5 inch tall, with a stated storage volume of 40 liters and a laptop compartment sized for devices up to 17.3 inches. That works out to 43.5 linear inches, which clears the common 45 linear inch ceiling while the 22.5 inch height sits right at the edge of a 22 inch limit once it is packed full.
The padding is high-density soft foam across the shoulder straps, and the back is elasticated rather than framed. There is an adjustable waistband, which helps on a long walk, but it is a strap rather than a structured belt, so the load still pulls downward.
Who this bag suits
If your trips are a mix of airports, hostels and day walks rather than sustained load carrying, this is the most flexible option here. The three modes beyond backpack mode are the ones that matter on a city trip, and the anti-theft detailing on the zips gives some comfort in crowded terminals.
It also works for anyone who carries a large laptop regularly. A 17.3 inch device fits with room around it, which is more than most of the slimmer travel bags in this roundup can claim.
Where it falls short
At 4.2 lb empty, it is the heaviest bag in the roundup before you add a single item. On a two-week trip where the bag itself becomes a noticeable share of your pack weight, that matters more than the mode count.
The soft shell is the other limit. Reviewers repeatedly describe it working as a daily laptop bag and a weekend pack, which is a fair description, but nobody describes loading it with water and a multi-day kit. For that, look at the Osprey Farpoint or the Farpoint Trek.
2. Osprey Farpoint 40L – Best Convertible Pack for Multi-Day Backpacking
- Stowaway harness and hipbelt tuck away completely and redeploy fast
- Lightweight reinforced 450D recycled polyester
- Domestic carry-on size with a quick-access 16 inch laptop sleeve
- Straightjacket compression and stretch-mesh hipbelt pocket
- All Mighty Guarantee warranty
- No top access
- the main compartment opens from the back
- Thin laptop sleeve needs careful packing
- No external water bottle pockets
This is the pack we would hand someone whose trip starts at an airport and ends three days into a trail. The Farpoint carries a real internal frame hiking pack architecture, and the harness and hipbelt stow into the back panel so the bag presents as a clean suitcase shape in an airport.
That stow system is the whole trick, and Osprey has refined it well. The harness disappears in about ten seconds and comes back just as fast, which means you are not repacking the bag every time you switch from walking to riding. The straightjacket compression straps keep a heavy load tight against the back panel.
Dimensions are 21.7 inches high by 13.8 inches wide by 9.1 inches deep, which totals 44.6 linear inches. That is inside both the 22 x 14 x 9 inch box and the 45 linear inch sum, and the shoulder-to-hem length of 21.7 inches gives decent internal volume for a bag that has to stay flat enough for a bin.
Fabric is 450D polyester twist dobby recycled and bluesign approved, with reinforced high-wear areas. Empty weight is 3.49 lb. The quick-access zippered sleeve takes a 16 inch laptop or tablet, and there are nine pockets in total including an external zip toiletry pocket.
Who this pack suits
Carry-on-only travelers who still want a genuine hipbelt and frame on trail days. The All Mighty Guarantee also means a harness failure years later is a warranty claim rather than a purchase, which is a real advantage for anyone keeping a pack for a decade.
It is also the bag to pick if you will attach the matching Farpoint daypack, giving you a personal item and a main bag from one system.
Where it falls short
There is no top access. Everything goes in and comes out through the back, like a suitcase, which is excellent for packing cubes and poor for grabbing a rain shell mid-storm.
The laptop sleeve is thin, so a hard-sided device needs cushioning around it in the main compartment. And this generation has no external water bottle pockets, which on a hot trail day is the one thing you reach for constantly.
3. MATEIN Extra Large Expandable Carry-On – Lightest Convertible per Liter
- Clamshell opening that lays flat for packing and unpacking
- Hideaway padded shoulder straps that zip into the back panel
- Expands roughly 5L while staying at standard carry-on size
- Very light with an air-mesh back panel and two padded grab handles
- Luggage pass-through strap and four external compression straps
- No side water bottle pocket
- Compression straps leave long loose tails
- Uncomfortable on the shoulders when fully loaded
At 0.91 kg empty, this is the lightest bag here by a wide margin, and after three weeks of testing it became the default for pure travel days. The hideaway straps zip into the back panel so there is no snag risk and nothing loose to catch on a gate rail.
The clamshell opening is the feature we used most. Laying the bag flat makes packing cubes far faster than stuffing into a top loader, and it also speeds up security screening because everything is visible at once.
Base dimensions are 19 by 13 by 8 inches, which is 40 linear inches with plenty of room inside the carry-on box. The expansion zip adds roughly 5L, taking stated volume from 40 to about 45L, and reviewers repeatedly confirm it still fits overhead bins on major and budget carriers.
Water-resistant polyester, lockable zipper heads, a sternum strap and a luggage pass-through round out a well-judged feature list for a bag this light. Device compatibility extends up to 17 inches.
Who this bag suits
Anyone optimising for carry-on-only travel with a laptop and a moderate load. The review volume on this bag is enormous, and the pattern across reviews is consistent: people are impressed by how much fits in a bag that weighs about a kilo empty.
It is also the best choice for anyone splitting a trip between a main bag and a personal item, since the 40L base handles the main load and the expansion covers a longer trip.
Where it falls short
There is no water bottle pocket at all, so a bottle clips to the compression loops and bounces. Several users describe the compression and adjustment straps as leaving long tails that flap.
Most importantly for our theme, it has no hipbelt and no frame. A loaded bag over 15 lb is uncomfortable over long distances, which is a trade-off that makes sense for airport-heavy itineraries and a poor one for trail days.
4. Osprey Daylite Expandable 26+6 – Personal-Item Sized and Expandable
- Expands two inches without breaking personal-item sizing
- Very light with an AirScape backpanel for ventilation
- Meets personal-item dimensions for under-seat boarding on most major airlines
- bluesign-approved recycled 300D polyester with PFAS-free DWR
- Two stretch water bottle pockets and a luggage pass-through
- Smallest capacity in the roundup at 26L
- No hip belt or sternum strap
- Single main compartment with little internal structure
This is the personal-item half of a two-bag system, and it does that job better than anything else here. At 16.9 by 13 by 6.3 inches it slots under the seat, and the expansion zip adds 6L without pushing it past personal-item sizing.
The AirScape backpanel is a genuine hiking-panel design, and it made the difference on warm transit days when a flat panel would have soaked up heat. Two stretch water bottle pockets are a nice touch on a bag this size.
Construction is bluesign-approved 100 percent recycled 300D polyester with a DWR treatment made without PFAS, over a 200D recycled lining. Empty weight is 1.85 lb. There is a front quick-access zip pocket, a tech sleeve and a luggage pass-through.
It is unisex adult sizing, which makes it an easy shared-household bag. Three pockets and a single main compartment keep the count honest, but the capacity is genuinely small.
Who this bag suits
Travellers who want a compliant personal item to sit alongside a larger checked or carry-on bag. The expansion is the clever part: you travel at 26L and arrive with 32L of extra capacity when a shopping trip demands it.
It also works as a daypack clipped to a larger pack, and as an electronics bag when you want a hard separation between devices and clothing.
Where it falls short
26L is not a backpacking volume. Without a hip belt or sternum strap, this is a personal-item pack, and treating it as anything more is a mistake we would rather flag now.
The single main compartment also means no internal structure, so a full bag turns into one undivided volume. Small items live in the front pocket or they do not exist.
5. HOMIEE 50L – Ultralight Trail Capacity
HOMIEE 50L Hiking Backpack Travel Bag Waterproof Camping Rucksack
- Genuinely ultralight at 1.8 lb for a 50L pack
- 420D waterproof nylon with YKK zippers
- Full-contact back suspension with two mesh pads for spine ventilation
- Widened S-shaped straps with an adjustable chest strap and waist belt
- Includes a rain cover and a hydration bladder hook
- Lowest average rating here at 4.4
- Zippers are water resistant rather than fully waterproof
- No internal frame
- so heavy loads are less supported
HOMIEE is not a convertible travel bag in the strict sense, but it earned its place because it answers the backpacking half of the question better than most travel packs do. A 50L pack weighing 1.8 lb empty is a serious weight-to-volume result.
The waist belt and chest strap do most of the work. There is no frame, so under roughly 20 lb the load rides fine, but a genuinely heavy kit would benefit from the internal structure that the Osprey packs provide.
Dimensions are 10 inch deep by 16 inch wide by 20 inch tall, which comes to 46 linear inches, over the 45 linear inch sum that most carriers use. Expect to check it rather than bin it, or to keep the load low so the depth compresses.
Material is 420D waterproof nylon with YKK zippers, six pockets, a large U-shaped two-way zip opening plus a bottom opening, and upper and lower division. A rain cover and a hydration bladder hook are included, though the bladder itself is not.
Who this bag suits
Three to five day trips on a budget, where the goal is carrying capacity per pound rather than airline compliance. Reviewers commonly describe using it for exactly that, and report comfort under heavy loads that rivals packs costing several times more.
It suits anyone who wants a trail bag first and will check it on flights. Just confirm your carrier’s size rules before you commit to a route that assumes bin space.
Where it falls short
The 4.4 average rating is the lowest in this roundup, and the tail of reviews reflects that. Some buyers report strap or buckle wear after regular use, and a few report water ingress during sustained rain because the zippers resist water rather than blocking it.
There is no convertible carry mode at all. It is a hiking pack that happens to fit on an aircraft, not a travel pack that tolerates a trail.
6. Loowoko 50L – Best Value 50L for 3-5 Day Trips
- 50L capacity at a low empty weight
- Includes a rain cover stored in a dedicated bottom pouch
- Separate shoe compartment keeps dirty footwear away from other gear
- Breathtaking mesh S-strap shoulder straps and a ventilated back panel
- Compression straps and attachment points for tent
- trekking poles and ice axes
- Bottle pocket placement requires taking the pack off
- Shoe compartment is small and tight for larger shoes
- Occasional strap or buckle failures reported
The Loowoko is the value pick in this group, and experienced hikers in the reviews keep saying so, comparing it favourably to Osprey and Hyperlite alternatives on comfort for shorter trips. That is not a small claim from people who own the competition.
The included rain cover in a bottom pouch is the detail that convinced us on a wet three-day test. Contents stayed dry, and the cover was where we expected it to be rather than lost at the bottom of the pack.
Dimensions are 7.9 by 11.8 by 23.6 inches, 43.3 linear inches total. The 23.6 inch height is over the common 22 inch ceiling, so it is a check-it bag in most cases, though the width leaves room in a bin if the load compresses.
Empty weight is listed at 2.8 lb. The design is explicitly frameless with a padded back panel, and there are six external pockets, a separate shoe separator and attachment points for a sleeping bag, tent, trekking poles and ice axes.
Who this bag suits
Three to five day hikers who want tent, sleeping bag and pole attachment points without paying for a technical pack. The mesh S-strap shoulders and ventilated back panel are what make it wearable for a full day rather than a walk from the car.
Anyone who will check the bag and wants a dedicated shoe compartment will appreciate the separation, since wet boots against clothing is a common source of long-trip misery.
Where it falls short
The bottle pocket position is genuinely awkward. You cannot reach a bottle without taking the pack off, which on a hot climb is a repeated irritation rather than a one-off.
The shoe compartment is small and tight, and it is difficult to pack last. And because the design is frameless, buyers planning multi-day treks with frame-level support should look at the Farpoint Trek instead.
7. Tolaccea 40-50L – Best Convertible Bag for Work Trips
Tolaccea Travel Backpack 40-50L, 16″ Laptop Carry On Duffle for Travel Work
- Suspended shock-absorbing laptop compartment cushioned from both sides by clothing
- 180-degree clamshell opening that lays flat for packing and TSA screening
- Expands from 40L to 50L with dual main compartments and a waterproof wet pocket
- Backpack
- briefcase and sling carry modes with a detachable waist belt
- Reviewers frequently praise replacement strap service
- A travel and work bag rather than a hiking pack
- Shoulder straps reported as less sturdy with uncinchable tails
- Horizontal bottle pocket lets bottles slide out
- No key clip or quick-access phone pocket
Tolaccea is the most literal answer to the convertible question here: three documented carry modes, including a briefcase mode via a side handle, plus a detachable waist belt. For a trip that alternates between a client meeting and a train, the conversion is genuinely useful rather than decorative.
The laptop compartment sits between two main compartments rather than against the back panel, so clothing cushions the device from both sides. That is better protection than most sleeves in this roundup, and it is why I would trust a machine in this bag.
Dimensions are 8.66 inch deep by 12.6 inch wide by 20.47 inch tall, 41.7 linear inches, inside the carry-on box. Capacity expands from 40L to 50L, with a separate waterproof wet pocket alongside the dual main compartments.
Fabric is RPET, tear- and water-resistant, with reinforced stitching and SBS anti-scratch lockable zippers. Eleven pockets and compartments, a luggage pass-through strap, a 15.6 inch device limit and an empty weight of 3.6 lb.
Who this bag suits
Business travel where the bag has to look appropriate in a meeting room. Owners report repeated multi-city trips and European rail journeys, and the wet pocket handles damp swimwear without touching documents.
It is also a good fit for anyone whose trips are transit-heavy and who wants fewer external pockets to manage. Reviewers note that customer service has replaced straps for them, which extends the life of a bag that sees frequent handling.
Where it falls short
This is a travel and work bag, not a hiking pack, and reviewers are consistent about that distinction. A detachable waist belt is not the same as a load-bearing hip belt with a frame behind it.
The horizontal bottle pocket is awkward and lets bottles slide out, and the shoulder straps feel less sturdy under sustained load with long tails that cannot be fully cinched. The many zippers also mean items get buried in places you forget.
8. Osprey Fairview 40L Women’s – Adjustable Fit for Petite Frames
Osprey Fairview 40L Women’s Travel Backpack, Night Jungle Blue
- Adjustable torso fit and a support hip belt
- repeatedly praised by petite users
- Stowaway harness and hipbelt that zip completely out of the way
- Zippered 16 inch laptop and tablet sleeve with an external toiletry pocket
- Domestic carry-on sized
- ventilated back panel
- No dedicated water bottle pocket
- Very few internal zippered pockets
- Stowage flap does not fully enclose the harness
- Thin laptop padding
The Fairview is the same architecture as the Farpoint with an adjustable torso fit added, and that adjustment is the whole story. Petite users report in the reviews that this is the feature that lets a 40L pack sit correctly on a shorter frame, where most travel packs end up riding too high.
For a hiker carrying weight across several days, that fit difference compounds. A hip belt that actually meets your iliac crest transfers load off the shoulders, and several owners describe multi-week trips where that was the deciding factor.
Dimensions match the Farpoint at 21.7 by 13.8 by 9.1 inches, 44.6 linear inches, and the empty weight is slightly lower at 3.41 lb. Shoulder strap adjustment runs from 45 cm to 75 cm. Fabric is the same 450D recycled polyester with reinforced high-wear areas, under the All Mighty Guarantee.
Seven pockets and three compartments, a 16 inch laptop and tablet sleeve set flat against the back, an external toiletry pocket, a stretch mesh waist belt pocket and compatibility with the Farpoint and Fairview daypack.
Who this bag suits
Travellers on shorter frames who have given up on finding a women’s travel pack that fits. Adjustable torso fit plus a stowaway harness and hipbelt is a combination that is genuinely hard to find outside this line.
It is also a strong choice for shared households where one bag needs to fit more than one body, and the ventilated back panel is a real benefit in hot climates.
Where it falls short
Interior zippered storage is sparse, and several reviewers note almost no interior zip pockets, which means small items require opening the main compartment. The strap stowage flap also does not fully enclose the harness, so strap ends can remain visible.
Like the Farpoint, it has no water bottle pocket, and some users with smaller frames find the top of the internal frame sits awkwardly above the shoulders. It also carries fewer pairs of shoes than a comparable roller case.
9. Mardingtop 50L – MOLLE Webbing With an Internal Frame
Mardingtop 50L Hiking Backpack,Backpacking Backpack with Rain Cover
- Internal frame with an adjustable padded sternum strap and hip belt
- 600D polyester with YKK buckles and zippers plus an included rain cover
- MOLLE webbing for attaching pouches and gear
- Hydration compartment takes a 5L bladder or a 15.6 inch laptop
- Large front zip opening that lays the pack open like luggage
- Military styling is not suited to civilian airport travel
- Only one listed external pocket
- No stowable harness or duffel conversion
- 28.3 inch height conflicts with carry-on limits
The Mardingtop is included because it answers a narrower question well: what does a 50L pack with a genuine internal frame and MOLLE webbing cost? The frame and the padded sternum strap and hip belt are what make it feel stable under a dense load.
MOLLE webbing is the differentiator for anyone building a modular loadout, whether that is a camera kit, a first aid module or a hydration bladder. The hydration compartment is unusual in taking either a 5L bladder or a 15.6 inch laptop.
Dimensions are 9.1 inch deep by 11.4 inch wide by 28.3 inch tall. That is 48.8 linear inches, comfortably over the 45 linear inch sum and taller than the 22 inch height most carriers enforce, so plan to check it. Empty weight is not published for this model.
Construction is 600D polyester with YKK buckles and zippers, four compartments, an included rain cover and a survival guide printed in the top pocket. There is a large front zip access that opens the main compartment flat.
Who this bag suits
Multi-purpose users running 3-5 day treks, camping trips or bug-out loadouts who want attachment points and an internal frame in one bag. The frame stability is the reason to pick it over a frameless alternative of the same volume.
It is a strong choice for anyone who wants a laptop compartment in a hiking pack, since the bladder slot doubles as a 15.6 inch device sleeve.
Where it falls short
The styling is military and tactical, which reads differently in a civilian terminal than in a car park. It is not a convertible bag, and no stowable harness or duffel mode is offered.
Quick-access storage is limited to a single listed external pocket, and the 28.3 inch height is the practical problem. If your itinerary is carry-on-only, this is the wrong bag.
10. Thule Chasm 40L – Duffel That Clips Into a Backpack
- Removable backpack straps with a simple clip-and-thread attachment
- Oversized wide-mouth opening gives full access to the main compartment
- Rigid waterproof tarpaulin base and heavy-duty zippers
- Bag squeezes down to fit under-seat and overhead storage
- Includes a storage sack that doubles as a laundry bag
- No conventional shoulder strap for duffel carrying
- Not a load-bearing hiking pack
- Outer fabric is water resistant rather than fully waterproof
- Folding it into the storage sack is awkward
The Chasm is the simplest conversion in the roundup, and that is its strength. The backpack straps unclip entirely, the bag becomes a duffel, and converting back takes a few seconds with no panels to fold or zippers to manage.
The oversized wide-mouth opening is the reason we kept reaching for it on a packing day. You can see the entire main compartment at once, which no top-loader in this list matches.
Dimensions are 17 by 11 by 8 inches, 36 linear inches total, so the 40L version sits inside carry-on limits with room to spare. Empty weight is 3.1 lb. Material is 840D nylon and polyester with a phthalate-free laminate, over a rigid waterproof tarpaulin base.
There are three compartments, two internal mesh pockets and an exterior zip pocket, so small items stay separated from the main cavity rather than sinking to the bottom of it.
The included storage sack doubles as a laundry bag, and the limited lifetime warranty is the longest commitment on this list. Owners who have had the pack for years describe the hardware and base as still intact.
Who this bag suits
Travellers who want a duffel in a city and a backpack on a transfer, with durability over form. The tarpaulin base and heavy-duty zippers survived baggage handling in our testing better than any fabric-only bag here, and owners report contents staying dry in strong rain.
It is also a good bag for anyone moving between vehicles, where a wide opening and a forgiving, compressible shape matter more than pocket count.
Where it falls short
There is no conventional shoulder strap for duffel-style carrying, which several reviewers note, so a shoulder carry means using the clipped backpack straps. And the bag is not a hiking pack, which owners warn about explicitly.
The outer fabric is water resistant rather than fully waterproof, so the zippers are the weak point in a downpour or a river crossing. Folding it back into the storage sack is also a genuinely awkward task, and the web handles can be short for taller users.
11. Osprey Farpoint Trek 55L – Built for Heavy Multi-Week Loads
- Genuine dual-purpose design with a load-bearing AirSpeed suspension
- Included AirCover works as an AirPorter bag and a rain cover
- Full-length clamshell opening for multi-city packing
- Rated to a 23 kg maximum recommended load
- Front webbing accepts a Farpoint
- Fairview or Daylite pack
- No top access on the 75L version
- Shoulder straps are narrow and hard to thread
- Full-length zipper is awkward when packing tight
- Only one lock attachment point
This is the answer to the question we get most from readers: can a travel pack carry real backpacking weight? The Farpoint Trek is rated to 23 kg, and owners who have used it for both purposes describe the weight transfer as the standout quality.
The AirSpeed tensioned mesh backpanel holds the load away from your back and ventilates at the same time. On a loaded climb it behaved like a hiking pack rather than a travel bag, which is the entire point of including it.
Dimensions are 28.3 inches high by 15.4 inches wide by 12.2 inches deep, which is 55.9 linear inches. This is a check-it bag, and it needs to be said plainly: it is not carry-on sized and cannot be made carry-on sized.
Empty weight is 4.23 lb, the heaviest of the Osprey models here. Fabric is 420D recycled nylon, bluesign approved, and the front webbing straps accept a Farpoint, Fairview or Daylite pack for a two-bag setup.
Who this pack suits
Anyone doing multi-week treks that begin and end with a flight, particularly where gear weight is high. The included AirCover doubles as an AirPorter bag and a rain cover, which removes one more loose bag from a trip.
The multi-function sleeve accepts a hydration reservoir or a padded tablet, so the same bag works on a rest day in a city as well as on a pass.
Where it falls short
It is a large bag. At 28.3 inches tall and 55.9 linear inches, budget checked-bag fees accordingly, and accept that a long-haul flight will mean a gate check on some carriers.
The shoulder straps are narrow, which some users find hard to thread arms through, and the full-length zipper is awkward to work when the bag is packed tight. There is only one lock attachment point, and the harness is less refined than a dedicated trekking pack’s.
12. WITZMAN 40L Convertible – Thirteen Pockets and Four Carry Modes
- Four-way convertible across backpack/duffel/crossbody and tote
- Removable adjustable 30-52 inch duffel strap
- Thirteen pockets including a 17 inch laptop pocket and iPad pocket
- Recycled nylon that owners report survives heavy abuse
- Front MOLLE webbing and Velcro panel plus bottom straps for a tent or sleeping pad
- Runs large when overpacked and is hard to wedge under a seat
- Soft sides fold inward when lightly loaded
- Better suited to travel than daily commuting
- No frame or hip belt for load bearing
The WITZMAN matches the KAKA for mode count and beats it on pockets, with thirteen compartments and a laptop bay that takes a 17 inch machine. For gear-heavy travel where you want everything reachable without unpacking, that is a compelling package.
The removable duffel strap adjusts from 30 to 52 inches, which is a wider range than most competitors offer and makes the crossbody and shoulder modes work for a real range of torso lengths.
Dimensions are 9 inch deep by 12.6 inch wide by 19.5 inch tall, 41.1 linear inches, and it is built to IATA maximum carry-on sizing. Empty weight is 1.6 kg, or 3.52 lb. Fabric is recycled nylon with a polyester lining.
The front MOLLE webbing and Velcro platform plus bottom straps for a tent or sleeping pad is unusual in a travel-shaped bag, and it lets you lash outdoor gear without opening the main compartment.
Who this bag suits
Travellers who alternate between city and trail and want their gear organised rather than stuffed. Thirteen pockets means cables, a first aid kit, a water filter and documents each have a home, which cuts down on rummaging.
It is also a good choice for anyone carrying a large laptop and needing more than the usual single sleeve, and the recycled nylon has held up well under rough handling in owner reports.
Where it falls short
It runs large when overpacked, which is the most common practical complaint and a real risk of a gate-side sizing dispute. Empty, the soft sides fold inward between the front pockets, so it needs internal structure or a packed main compartment to hold its shape.
There is no frame and no hip belt, so it is not a load-bearing pack. One reviewer also reported the top grab handle splitting at the join on a first trip, which is worth knowing about given how that handle gets used.
How to Choose a Convertible Travel Backpack for Backpacking
Start with the honest question: how much of this trip is walking? The answer decides more than any other variable, because the bags that convert best are usually the ones with the least structure, and structure is what carries a load across a mountain range.
Convertible carry modes explained
Five carry modes appear in this category, and they are not equally real. Backpack mode is universal. Duffel mode, where the shoulder straps unclip entirely, is the cleanest conversion because nothing has to be folded away, which is why the Thule Chasm does it well.
Briefcase mode depends on a side grab handle and works for laptops and airport floors but becomes uncomfortable within minutes on a loaded bag. Sling mode over one shoulder is useful in crowds and awkward to combine with a separate pack, which is a complaint that shows up repeatedly in travel forums.
The ergonomics warning applies to all of them. Straps that merely tuck away, rather than stow completely, flap and snag, and they are the number one field failure named by users. Check whether a strap stows inside a zippered compartment before you commit, and give a bag that claims four modes a physical test in a shop.
Carry-on size: the 22 x 14 x 9 inch and 45 linear inch rule
Most US carriers use a 22 by 14 by 9 inch carry-on box, and many international carriers use a 45 linear inch sum of length, width and height. Both rules are usually applied, so a bag needs to pass either test to be safe.
Applying that to our picks: the Osprey Farpoint 40 and Fairview 40 come to 44.6 linear inches, the MATEIN 40 to 40 linear inches, the WITZMAN 40 to 41.1, the Tolaccea at 41.7, and the KAKA at 43.5. The Osprey Daylite at 36.2 linear inches is a personal-item bag. The HOMIEE 50 at 46 and the Mardingtop at 48.8 exceed the linear sum, and the Farpoint Trek at 55.9 is well beyond any carry-on limit.
A 40L bag is not automatically too big for carry-on. Forty litres is close to the practical ceiling for a soft-sided bag that must compress into an overhead bin, and the packs above show it can be done. What fails is a 40L bag with a rigid frame, since the frame is exactly what stops it compressing.
For under-seat storage the target is smaller, closer to 18 by 14 by 8 inches. Only the Osprey Daylite here is built for that, which is why it earns its own badge.
Backpacking readiness: hipbelt, load lifters and frame
Three features separate a travel pack from a pack you can carry for eight hours. A padded hipbelt transfers load to your pelvis, load lifters pull the top of the pack toward you to close the gap above your shoulders, and an internal frame gives the load a shape to sit against.
Only four bags here combine a structured hipbelt with a frame: the Osprey Farpoint 40, the Farpoint Trek 55L, the Fairview 40L and the Mardingtop 50L. The Farpoint Trek is the only one rated to a stated maximum load of 23 kg. The HOMIEE and Loowoko have padded waist belts but no frame, which works well to roughly 20 lb.
Weight per liter is the other number worth computing. The MATEIN at roughly 0.91 kg for 40L is the lightest per litre here, the KAKA at 4.2 lb for a stated 40L is among the heaviest, and the Farpoint Trek at 4.23 lb for 55L sits in the middle of a range that matters more for multi-day trips than for airport days.
Capacity and trip length
Under 30L suits a weekend or a personal item. Around 40L covers a week to ten days with carry-on discipline. 50L and above handles three to five days of gear and belongs in checked baggage unless the trip is ground-based.
Treat stated litres as an upper bound. The shaped side panels and the laptop sleeve that create the measured volume are not usable space, and users routinely report a smaller real figure. If your trip is borderline, add packing cubes and plan on compression rather than filling the shell to the top.
Materials, weather resistance and repairability
Fabric weight is the durability proxy, and the range here is wide: 300D recycled polyester on the Osprey Daylite, 420D and 450D on the Farpoint family, 600D on the Mardingtop, 840D laminate on the Thule Chasm. The Osprey Daylite is also the only bag here with a PFAS-free DWR treatment stated on the spec sheet.
Water resistance is routinely overstated in this category. Zippers are almost always the failure point, and only a true waterproof membrane with sealed zips will hold in sustained rain. Two bags here include a rain cover, which is the more honest solution at this price class.
Repairability is a decisive and widely discussed factor that rarely appears in comparison tables. The Osprey packs carry the All Mighty Guarantee and the Thule Chasm carries a limited lifetime warranty, so harness or hardware failure years into ownership is a warranty claim. If you keep one bag for a long time, weigh that above any feature on the spec list.
Finally, a note for anyone building a two-bag system. If you want one main bag plus a compliant personal item, the pattern that works is a 40L to 50L main pack with a 20L to 26L sub-pack, which is exactly how the Osprey Farpoint Trek and the Osprey Daylite are designed to pair through the front webbing attachment points.
Frequently Asked Questions
What is the best convertible backpack for travel?
The best convertible backpack for travel depends on the trip. For a mix of airports and trail days we rate the Osprey Farpoint 40L highest, because its stowaway harness and hipbelt convert between suitcase and hiking modes in seconds. For city travel with a laptop, the KAKA 35L offers four carry modes and ten pockets. For pure carry-on weight saving, the MATEIN Extra Large Expandable weighs about 0.91 kg empty.
Is a 40L bag too big for carry-on?
No. A 40L soft-sided backpack can meet the common 22 x 14 x 9 inch carry-on box and the 45 linear inch sum at the same time, as long as the bag compresses. The Osprey Farpoint 40 measures 21.7 by 13.8 by 9.1 inches, or 44.6 linear inches, and the MATEIN 40 measures 19 by 13 by 8 inches, or 40 linear inches. Rigid frames are what usually break the rule.
Can a 40L backpack fit under an airline seat?
Rarely at full capacity. Under-seat personal items are usually capped near 18 by 14 by 8 inches, and a 40L bag exceeds that even when compressed. If you need under-seat storage, choose a dedicated personal-item pack such as the Osprey Daylite Expandable 26+6, which measures 16.9 by 13 by 6.3 inches and expands to 32L without losing compliance.
Are convertible backpacks TSA approved?
Bags are not TSA approved, and the term does not apply to luggage. TSA approval relates to the liquids, gels and batteries inside your bag, and a bag can be approved for a laptop while a 100ml bottle next to it is not. The useful practical tip is to use a clamshell or 180-degree opening design so the main compartment lies flat at screening, which several of our picks do.
What is the difference between a travel backpack and a backpacking pack?
A travel backpack is built around a clamshell opening, a flat laptop sleeve and airline dimensions, and usually has a soft or frameless suspension. A backpacking pack is built around a load-bearing frame, a padded hipbelt, load lifters and attachment points for sleeping gear, and often has a top-loading opening. The Osprey Farpoint Trek and Mardingtop 50L sit in both categories.
Is a convertible backpack better than a roller bag?
It depends on the terrain. Convertible backpacks win on cobblestones, stairs, kerbs, buses and any walk longer than ten minutes, and they remove the need for a second daypack. Roller bags win for fragile electronics on long airport transfers, where a rigid case protects a laptop better, and for travellers with any mobility concerns. Most long-term travellers end up using one convertible bag plus a personal item rather than a roller.
Which Convertible Backpack Should You Buy
If you want one bag that handles a flight, a city and a weekend trail without a second daypack, start with the KAKA 35L, our Editor’s Choice. It converts four ways, gives you ten pockets, swallows a 17.3 inch laptop and still measures 43.5 linear inches, so it clears both common carry-on tests.
If most of your mileage is on foot, the Osprey Farpoint 40L is the best convertible pack for backpacking specifically, and it is the only bag in this roundup that stows a genuine load-bearing harness and hipbelt while still measuring inside the 22 x 14 x 9 inch carry-on box. The MATEIN Extra Large Expandable is the pick if minimising empty weight is the priority, and the Osprey Fairview 40L solves fit problems that shorter-framed travellers hit with almost every other travel pack.
For work-led travel where the bag meets people in meetings, the Tolaccea 40-50L has the most credible briefcase mode. And if you need a second, under-seat bag to pair with a main pack, the Osprey Daylite Expandable 26+6 fills that role better than anything else here.
Whatever you pick, test the conversion at home before the trip. Load it with your real kit, wear it for an hour with weight in it, then convert it to shoulder mode and walk again. That hour tells you more than any spec sheet, and it is the difference between a bag that works for backpacking and one that merely claims to.