Last Updated on August 1, 2026 by Tyler Morgan
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Choosing a carry-on backpack is mostly a tradeoff between packing space, airline fit, carrying comfort, and build quality. The MATEIN Carry on Backpack 40L gives you a roomy suitcase-style interior, an expansion zipper, and straps that tuck away when you want to carry it like a briefcase. Its low weight and practical layout suit short trips, but the soft structure and basic harness are less convincing when you pack it heavily. This review explains where the black X-Large model works well, where it falls short, and what you should confirm before taking it on a flight.
Quick Verdict
Rating: 7/10, recommended with caveats
Best For: Budget-focused travelers who want a light, roomy backpack for weekend trips and overhead-bin use.
Bottom Line: The MATEIN 40L offers useful capacity, suitcase-style packing, and flexible carry options at a budget-friendly level. Its soft shell, modest support, and airline-size uncertainty make it less suitable for heavy loads or strict personal-item travel.
| Specification | Detail |
|---|---|
| Brand | MATEIN |
| Model / style | 1159BLK |
| Product type | Expandable carry-on travel backpack |
| Size | X-Large |
| Listed capacity | 40 liters, with an expansion zipper for added packing room |
| Listed dimensions | 19 x 13 x 8 inches |
| Listed weight | 0.89 kg, about 2 pounds |
| Material | Lightweight water-resistant polyester with polyester lining |
| Shell | Soft-sided |
| Color | Black for the linked variant |
| Device compatibility | Listed for devices up to 17 inches |
| Organization | Three compartments and five pockets listed |
| Carry options | Hideaway backpack straps, top and side handles, luggage pass-through |
| Care | Hand wash or wipe with a damp cloth, do not machine wash |
| Certification shown on listing | OEKO-TEX STANDARD 100 |
What Is the MATEIN Carry on Backpack?
The MATEIN Carry on Backpack reviewed here is the black X-Large 40L model, style 1159BLK. It is a soft-sided travel backpack designed to open and pack more like a small suitcase than a school daypack. The main compartment uses compression straps to hold clothing in place, while external straps help reduce bulging after you load the bag.
The design is aimed at adults taking weekend trips, short vacations, road trips, or flights where a backpack may be easier to manage than a roller bag. Its hideaway shoulder straps let you switch to top-handle or side-handle carry, and the rear luggage strap can slide over a suitcase handle. The expansion zipper adds room, but the 40L and 45L labels refer to separate size variants in the broader MATEIN range, not a verified expansion from 40L to exactly 45L.
Before You Buy: Do not assume this 19 x 13 x 8-inch backpack will qualify as a free personal item or fit under every airline seat. Check your airline’s current limits, measure the bag after packing, and remember that using the expansion zipper can make it too deep for stricter rules.
Who Should Buy It?
Best For
- Weekend travelers who want a roomy, suitcase-style backpack.
- Budget-focused flyers who normally use an overhead carry-on allowance.
- Travelers who value stowable straps, compression straps, and a luggage pass-through.
Skip If
- You need a guaranteed under-seat personal item for a strict airline.
- You regularly carry dense, heavy loads and need a rigid frame or premium harness.
- You want maximum laptop protection from a structured, heavily padded compartment.
Feature-by-Feature Review
Capacity and Suitcase-Style Packing
The listed 40L capacity gives you enough room for clothing, toiletries, and travel accessories for a short trip, especially when you use packing cubes. The large opening makes it easier to see and arrange your gear than a narrow top-loading daypack. Internal compression straps help keep folded clothing from shifting when the backpack is upright.
The expansion zipper is useful for a bulky layer or last-minute items. It also increases the bag’s depth, which can create two problems: the backpack may become harder to fit in a baggage sizer, and the soft shell can bulge unevenly. For air travel, pack to the airline limit first and treat the expansion as backup space rather than your default setup.
Carry System and Comfort
The padded shoulder straps can be unclipped and stored behind the back panel. This keeps loose straps from catching when you place the bag in an overhead bin, carry it by a handle, or slide it through a security tray. An adjustable sternum strap can help steady the load, while the air-mesh back panel gives some ventilation.
Comfort depends heavily on how much weight you add. The backpack is light because it uses a soft polyester shell and a basic support system. That is helpful when you are trying to keep the empty-bag weight low, but it provides less structure than a travel pack with a firm framesheet, load lifters, or a padded hip belt. A fully packed 40L bag may sag or feel lumpy if hard objects sit against the back panel.
Convertible Carry and Luggage Attachment
Top and side handles let you lift the backpack like a small suitcase. The side handle is especially useful when removing the bag from a car trunk or overhead compartment. The luggage pass-through fits over a rolling suitcase handle, so you can rest the backpack on your main luggage during long airport walks.
The briefcase-style option is best for short carries. Once the bag is fully loaded, the handles concentrate the weight in one hand, and the soft body may flex. For longer walks, the shoulder straps are the more practical choice.
Organization and Device Storage
The listing identifies three compartments and five pockets, giving you separate areas for clothes, smaller travel items, and quick-access essentials. The organizer layout is useful for cables, documents, pens, and toiletries, but nearby pockets can compete for the same internal space when both are overfilled.
The listing states compatibility with devices up to 17 inches. Laptop dimensions vary even when screen sizes match, so measure your device before ordering. Because this is a soft travel bag rather than a rigid computer case, a separate padded sleeve is a sensible addition when you carry an expensive laptop.
Material, Zippers, and Weather Resistance
The outer fabric and lining are polyester, and the listing describes the material as water resistant. That should help with light rain and small splashes, but water resistant does not mean waterproof. Zipper openings, seams, and prolonged exposure can still allow moisture inside, so use a rain cover or waterproof pouch for electronics in wet conditions.
The zipper heads are designed to accept a small lock, and external compression straps help reduce pressure on the main zipper. The lightweight fabric keeps the bag easy to store, but it also gives the backpack less shape. You should expect a softer, more flexible feel than you would get from a premium structured travel pack.
Pro Tip: Place flat, soft items against the back panel, keep shoes or dense chargers near the bottom and center, and tighten the internal and external compression straps evenly. This reduces lumps and helps the backpack carry closer to your body.
How It Performs in Real Use
Weekend Flights
For a two- or three-night trip, the 40L layout gives you flexible packing space without the wheels and handle system of a small suitcase. The clamshell-style opening works well with packing cubes, while the stowable straps keep the exterior tidy at the gate. It makes the most sense as an overhead carry-on unless your airline has generous personal-item limits.
Airport Connections
The luggage pass-through is helpful when you also have a roller bag. When you need to carry the backpack, the sternum strap can reduce side-to-side movement. Long walks become less comfortable as the load gets heavier because the harness does not have the support features found on more expensive travel packs.
Road Trips and Short Stays
The soft body is easy to fit into a car trunk, hotel closet, or storage shelf. The top and side handles make it simple to move the bag between a vehicle and your room. Because the backpack does not hold its shape on its own, packing cubes also make loading and unloading faster.
Long-Term and Frequent Use
The MATEIN is better viewed as a value-focused travel bag than an expedition pack. Its polyester construction and lockable zipper heads cover normal leisure travel needs, but the soft structure and basic hardware are not ideal for repeated overpacking, rough baggage handling, or heavy outdoor use. Leaving a little unused space can reduce strain on the seams and zippers.
How to Pack and Use It Correctly
- Check the airline limit before packing. Compare the published bag dimensions with the airline’s current carry-on and personal-item rules.
- Measure the packed bag. Soft bags expand beyond their listed shape, especially when pockets and the expansion zipper are full.
- Balance the load. Keep dense items low and close to your back, with soft clothing around them.
- Protect electronics. Confirm your laptop’s actual width, height, and thickness, then add a padded sleeve if needed.
- Use both sets of compression straps. Tighten them evenly so the load does not pull to one side.
- Stow the straps when appropriate. Hide them before placing the bag in an overhead bin or carrying it by the side handle.
Care, Warranty, and Practical Limits
The product care instructions call for hand washing or wiping the backpack with a damp cloth. Do not machine wash it. Empty every pocket first, use mild soap only where needed, and let the bag air-dry fully before storing it. Avoid direct high heat, which can affect synthetic fabric and coatings.
MATEIN’s published warranty covers defects in materials and workmanship for as long as you own the product, subject to its terms and registration requirements. Normal wear, including expected zipper, buckle, fabric, and cosmetic wear, is excluded. This is different from Amazon’s return window, so review both policies before purchase and save your order details.
Pros and Cons
Pros
- Roomy 40L capacity with an expansion zipper for extra packing space.
- Lightweight polyester construction keeps the empty-bag weight low.
- Hideaway shoulder straps support backpack and briefcase-style carry.
- Internal and external compression straps help control the load.
- Luggage pass-through and top and side handles improve airport handling.
Cons
- Soft structure can sag or feel lumpy when packed unevenly.
- Basic harness is less supportive for heavy loads and long walks.
- Its size is not a guaranteed fit for under-seat or strict personal-item rules.
Is It Worth the Price?
The MATEIN Carry on Backpack sits in the budget end of the travel-backpack market. Its value comes from giving you a 40L packing area, convertible straps, compression features, and a luggage pass-through without the cost or empty weight of a premium pack. It is worth considering when you take occasional weekend trips and care more about usable space than rigid structure.
The value drops if you plan to carry heavy gear for hours, need a guaranteed personal-item fit, or expect premium hardware and back support. Buyers who fly often may get better long-term comfort from a more structured pack, even if it costs more and offers slightly less capacity.
How It Compares to Alternatives
The Osprey Daylite Carry-On Travel Pack 35 is a more premium alternative with a smaller 35L capacity, a more developed back panel, and a dedicated quick-access area for many laptops. It is the better comparison if carrying comfort and brand-backed travel design matter more than maximum budget value.
The Cabin Max Metz 44L prioritizes simple, high-capacity cabin packing in a lightweight format. The MATEIN makes more sense when you specifically want hideaway straps, a luggage pass-through, and multiple compression points in a 40L bag. Always compare each bag’s dimensions with the airline you use most.
Frequently Asked Questions
Is the MATEIN Carry on Backpack suitable for international travel?
It can work for international trips when the packed dimensions meet your airline’s rules. Airline limits vary by carrier, route, and fare, so check the current allowance and avoid expanding the bag when space is tight.
Will it fit under an airplane seat?
It may fit under some seats when lightly packed, but the listed 19 x 13 x 8-inch size is too large to treat as a guaranteed personal item. Use it primarily as an overhead carry-on unless your airline’s published limit confirms otherwise.
Does the 40L model expand to 45L?
The expansion zipper adds packing room, but the available evidence does not establish an exact 40L-to-45L change. MATEIN also sells separate 40L and 45L size variants, so do not confuse the larger model with the expanded capacity of this one.
Can it hold a 17-inch laptop?
The Amazon listing states compatibility with devices up to 17 inches. Because laptop bodies differ in size and the bag is soft-sided, compare your device measurements and use a padded sleeve if you need stronger impact protection.
Is the backpack waterproof?
No. The polyester material is listed as water resistant, which can help with brief light rain or splashes. Use a rain cover or waterproof inner pouch when you carry electronics or travel in sustained rain.
Can you machine wash the MATEIN backpack?
No. The listed care instructions say to hand wash or wipe the bag with a damp cloth and not to machine wash it. Let it air-dry completely before repacking or storing it.
What does the warranty cover?
MATEIN’s published warranty covers defects in materials and workmanship under its stated terms. It excludes normal wear and damage from misuse, and the company notes a registration requirement, so read the current policy and keep your proof of purchase.
Who should skip this backpack?
Skip it when you need a firm frame, a load-bearing hip belt, premium laptop protection, or a guaranteed free personal-item fit. It is designed for practical, budget-conscious travel rather than technical hiking or heavy daily hauling.
The Bottom Line
The MATEIN Carry on Backpack 40L is a practical choice for budget-focused travelers who want generous packing space, stowable straps, and suitcase-style access for short trips. Skip it if you need strong load support, rigid laptop protection, or guaranteed under-seat sizing, because its main tradeoff is a soft, lightly structured build.