KLOSTAIN 40 × 20 × 25 cm 20 L Cabin Backpack

The KLOSTAIN cabin backpack is listed at 40 × 20 × 25 cm with a 20-litre capacity, and is intended for under-seat travel. It combines a separate laptop compartment, wet pocket and multiple storage areas, but airline size rules and the bag’s packed dimensions should be checked for each trip.

At a glance

The listing claims a 40 × 20 × 25 cm size and 20-litre capacity, aimed at under-seat cabin travel.
Separate laptop storage and a dedicated wet pocket help keep different items apart.
The listing specifies seven pockets and six compartments, plus a quick-access front pocket and mesh storage.
Adjustable shoulder straps and an airflow back panel are listed for carrying comfort.

Price

£26.56Save 28%

Reference price: ~~£36.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

A dedicated laptop compartment is specified for devices up to 15 Inches.
The wet pocket and multiple storage areas support separating damp items and organising travel essentials.
The listing describes adjustable padded shoulder straps and a ventilated back panel.

Technical specifications

21 specifications

Identity and size
Brand	Guangzhou Yueke Leather Co., Ltd.
Capacity	20 Liters
Size	40 x 20 x 25cm-20L
Listed dimensions (D × W × H)	20D x 20W x 25H centimetres
Colour	Light Purple
Product style	Compact

Organisation and carry
Maximum compatible device size	15 Inches
Pockets	7
Compartments	6
Closure	Zipper
Strap type	Shoulder Strap
Harness type	Shoulder Harness
Special features	Airflow Back Panel, Anti-Theft, Dedicated Laptop Compartment, Dedicated Wet Pocket, Adjustable Shoulder Straps

Materials and protection
Material	Polyester
Shell	Soft Shell
Water resistance listed	Water Resistant
Care	Wipe with Damp Cloth

Use and design
Recommended uses	Leisure, School, Travel
Design	Laptop Backpack
Pattern	Solid
Age range	Adult

What to know before buying

Listing details to confirm

The listing gives the size as 40 x 20 x 25cm-20L and also gives dimensions as 20D x 20W x 25H centimetres. These dimensions are inconsistent with one another. Check the exact bag dimensions and the selected airline’s current cabin allowance before travel. The 15 Inches device limit is a listed maximum, not confirmation that every laptop of that screen size will fit.

Who is it for?

A good fit for

Travellers looking for a compact backpack marketed for under-seat flights.
People who want separate laptop and wet-item storage in a travel or school bag.
Buyers who prefer adjustable shoulder straps and a padded airflow back panel.

Less suited to

Anyone needing a larger carry-on capacity or confirmed dimensions for a particular airline’s rules.
Buyers who need verified protection against heavy rain or a precisely measured laptop fit.

KLOSTAIN 40 × 20 × 25 cm 20 L Cabin Backpack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 8,450 ratings

5 stars78%78%
4 stars15%15%
3 stars4%4%
2 stars1%1%
1 star2%2%

Customer feedback highlights organised storage, perceived quality, comfort and usefulness for short trips and budget-airline travel. The listing’s laptop compartment, pockets and padded adjustable straps suit those needs, but positive reports of airline fit do not resolve the conflicting dimensions given on the product page. Aggregate ratings are mostly five-star, though ratings alone do not establish why customers responded as they did.

Positive themes

Customers describe the pockets as useful for organising clothing, toiletries and electronics.
Feedback describes the backpack as practical for short trips and comfortable on the shoulders.
Customers report that it fits under budget-airline seats.

Frequently asked questions

What size is this KLOSTAIN backpack?

The listing claims 40 x 20 x 25cm-20L, but its separate dimension entry says 20D x 20W x 25H centimetres. Those measurements conflict, so confirm the exact size before relying on it for an airline allowance.

Will it fit under an airline seat?

The product is marketed for under-seat travel, but fit depends on the actual bag dimensions and the airline’s current rules. The listing’s two dimension entries are inconsistent.

What laptop size does it support?

The listed compatible device size maximum is 15 Inches. Check your laptop’s actual dimensions against the compartment, since screen size alone does not establish fit.

Does it have a wet pocket?

Yes. A dedicated wet pocket is listed, intended to separate wet items from the main compartment.