# KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack

Underseat: The KLOSTAIN Ryanair cabin backpack is listed at 40 × 30 × 20 cm with 24 L capacity, a padded laptop sleeve and five pockets. Its layout is aimed at short trips and airline travel, with water-repellent polyester and a dedicated compartment for damp items.

- [Original product page](https://bargainpostbox.co.uk/product/klostain-40x30x20-24l-underseat-laptop-backpack)
- [View offer](https://bargainpostbox.co.uk/visit/klostain-40x30x20-24l-underseat-laptop-backpack)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: KLOSTAIN
- Category: Fashion & Accessories > Bags & Luggage > Backpacks
- Price: 29.98 GBP
- Previous price: 36.99 GBP
- Discount: 19%
- Price checked: 2026-11-14T19:28:50.839Z
- Rating: 4.6 / 5
- Reviews: 8450

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listing describes a padded laptop sleeve, main compartment with compression straps and a front pocket for travel documents.
- Two side mesh pockets are described for a bottle or umbrella, alongside a separate wet pocket for damp toiletries.
- An anti-theft back pocket and four side buckle straps are listed as travel features.
- The listing claims compatibility with Ryanair, easyJet, British Airways, Wizz Air and Eurowings. Airline rules and fit can vary, so verify current baggage allowances.

## Pros

- 24 L capacity and a compact listed size suit buyers prioritising an underseat-style travel bag.
- Separate laptop, wet-item and quick-access storage can help keep common travel items apart.
- Padded, adjustable shoulder straps are described for carrying through terminals.

## Cons

- At 15 inches maximum compatible device size, it is not listed for larger laptops.
- Water resistance is described as water repellent, not waterproof.

## Specifications

### Identity and capacity
- Brand: Guangzhou Yueke Leather Co., Ltd.
- Capacity: 24 Liters
- Dimensions (D × W × H): 20D x 30W x 40H centimetres
- Size variant: 40x30x20cm-24L
- Colour: Light Grey
- Country of origin: China
### Materials and protection
- Material listed: 100% polyester
- Water resistance listed: Water Repellent
- Shell: Soft Shell
### Storage and carrying
- Maximum compatible device size: 15 Inches
- Pockets: 5
- Closure: Zipper
- Strap type: Padded Strap
- Harness type: Shoulder Harness

## Before you buy

- The stated dimensions and airline compatibility are listing claims rather than a guarantee of acceptance. Check the airline's current allowance and measure the packed bag, as its shape and fullness may affect fit. The wet pocket is for separating damp items and does not establish that the bag is waterproof.

## A good fit for

- Short-haul travellers looking for a compact carry-on backpack with organised storage.
- Travellers carrying a laptop up to the listed 15-inch device size.
- Buyers who want a separate wet pocket and quick-access travel storage.

## Less suited to

- People needing a backpack specified for laptops larger than 15 inches.
- Travellers who need confirmed waterproof protection or guaranteed airline acceptance.

## Customer feedback

Customer feedback highlights organised pockets, useful space for short trips, comfortable shoulder padding and a reported fit under budget-airline seats. Those impressions align with the listed 24 L capacity, five pockets and padded straps, but do not guarantee that every packed bag will meet an airline's size rules. Aggregate ratings lean positive, though ratings alone do not explain individual experiences.
- Positive themes: Feedback describes the pockets as useful for organising clothing, toiletries and electronics.
- Positive themes: Customers report comfort from the shoulder padding and practical use on short trips.

## Frequently asked questions

### What are the listed dimensions and capacity?
The listing gives dimensions of 20D x 30W x 40H centimetres and capacity of 24 Liters. It also describes the bag as 40x30x20cm-24L.
### What size laptop does it accommodate?
The listed maximum compatible device size is 15 Inches. Check your device's measurements against the sleeve before buying.
### Is the backpack waterproof?
No waterproof claim is supplied. Its listed water resistance is Water Repellent, and the feature text describes protection from light rain or spills.
### Which airlines is it listed for?
The listing names Ryanair, easyJet, British Airways, Wizz Air and Eurowings. Confirm current baggage rules with your airline, since the listing does not guarantee acceptance.

## Alternative options

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## Images

![KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack — 1](https://bargainpostbox.co.uk/i/hKGmJWxywMDRbAe01cUZP60KBd9e9mhAcWas_TWAdaMqX9aerfbiyDHuWD-ChINUwzDuGNy0bqq52ni7j9j7bzLFIcX2aJJgxSA0sHqadiq702khh6YwreIy.jpg)

![KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack — 2](https://bargainpostbox.co.uk/i/Wkr7Z5uKuurGo8HAaDfk5Kmo9bdL6Pt8IAupapyrAOFsfM8C-Z1Yyox7AHRWkV1616toQDVih9G3OiQdSoJGD2k_fhujbxfpAhUaY2-Ka_oi6lCUhiaWgcLg.jpg)

![KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack — 3](https://bargainpostbox.co.uk/i/KcY1k6KbLp5cQQMeMvPm8C_o8YN5zjUBNW5UyITudST3rar9ccVZVcn3INQxIbXtOZOFrbCWdwN74E5NLjo3K9dohexAIWUtkRwUwUl5NxYLb4cszgGhqVNk.jpg)

![KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack — 4](https://bargainpostbox.co.uk/i/QjlgMZ9KOoBvvshgcnnszSZpccYk_fMFDPBmPDmqZTx6leMCqM_mGZ5dSic_1_noaNops6xMGZQN6Wt_44hLf0iE2TBKG9MCpgG-vCxUoGHXnqo0xbi29_xc.jpg)

![KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack — 5](https://bargainpostbox.co.uk/i/b_RtoolU5n59d4HoJ6IWXfav2Vf4WWouOYb8TGCQkNHz_YxGHPdALBxOpIpFb5jInJHggjNflc_4JmJwfbixvmwuSrxCgzNGOW_heA-wp-FIXQGywc6Lcquo.jpg)

![KLOSTAIN 40 × 30 × 20 cm 24 L Underseat Laptop Backpack — 6](https://bargainpostbox.co.uk/i/vyOpJ2Kg__11MM91Rlnn4BB4oUCXE_g21HhddoKQmBVpzRET7PnhIg3mWsQ1Ef5ITDG3Nmaz3FGb_Lb4QjdDojirxGDae_2DavNAbOPElkkl3ZD5IhudSZNK.jpg)