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KLOSTAIN Premium Cabin Backpack 40x20x25 cm – 20L Ryanair & easyJet Underseat Bag
Free underseat bag
The compact cabin backpack that fits the free personal item sizer on Ryanair and easyJet.
Travel light and stop paying for hand luggage.
- 40x20x25 cm, within the free size limits of Ryanair, easyJet and Wizz Air – no extra fees
- 20 litres, cleverly organised: enough for 2 to 4 days thanks to the compression strap
- Opens flat to 180° like a suitcase: everything is easy to pack and find, even at security
- Separate laptop compartment for laptops up to 14″, kept apart from the rest of your things
- Hidden anti-theft back pocket and luggage strap to slide over your suitcase handle
- Smarter finish and reinforced base: as sharp at the office as at the airport
- Padded airflow back, cushioned straps and chest strap: comfortable even when full
Size:
Colour: Black
24–48h delivery
14-day money-back guarantee
Ships from France
Also available in the Classic version with a USB port: see the model
Description
Stop paying for your hand luggage
On low-cost airlines, only the small bag that fits under the seat in front of you is free. The KLOSTAIN 20L is designed around that size, so you can take the essentials with no extra fees, there and back.
💶
Savings on every flight
No need to add a paid bag: your backpack pays for itself within a few trips.
🧳
Everything in its place
180° opening, compressible main compartment, laptop sleeve and quick-access pockets: no more digging around.
🙌
Made for walking
Airflow back, padded straps and a chest strap: you’ll forget you’re carrying it.
Accepted by the major airlines
The 40 x 20 x 25 cm format meets the free personal item size of the main airlines, and of course their cabin bag limits.
| Airline | Maximum size | Bag type | KLOSTAIN Premium 20L |
|---|---|---|---|
| Ryanair | 40 x 30 x 20 cm | Free personal item | ✓ Accepted |
| easyJet | 45 x 36 x 20 cm | Free personal item | ✓ Accepted |
| Wizz Air | 40 x 30 x 20 cm | Free personal item | ✓ Accepted |
| Vueling | 40 x 30 x 20 cm | Free personal item | ✓ Accepted |
| Eurowings | 40 x 30 x 25 cm | Free personal item | ✓ Accepted |
| British Airways | 56 x 45 x 25 cm | Cabin bag | ✓ Accepted |
| Virgin Atlantic | 56 x 36 x 23 cm | Cabin bag | ✓ Accepted |
| Lufthansa | 55 x 40 x 23 cm | Cabin bag | ✓ Accepted |
Organisation that saves space
- 180° suitcase-style opening: the bag opens flat so you can see everything at a glance
- Main compartment with a compression strap to keep clothes compact
- Separate laptop compartment for laptops up to 14″, with pockets for cables, pens and chargers
- Quick-access front pocket for your phone, earphones or boarding pass
- Water-resistant layer to keep damp items separate
- Two side pockets for a water bottle and umbrella
- Anti-theft back pocket, hidden while you wear the bag
- Luggage strap: slide the bag over the handle of your wheeled suitcase
- Reinforced base and smarter finish so the bag keeps its shape
What fits in 20 litres
Example for a 3-day weekend. A rough guide – it depends on what you pack.
👕3 T-shirts
👖1 pair of trousers
🧦Underwear and socks
🧴Wash bag
💻14″ laptop
🔌Chargers and cables
📘A book
🪪Passport and documents
Comfortable from take-off to arrival
- Padded airflow back that lets air circulate
- Wide, cushioned shoulder straps, adjustable in length
- Chest strap to keep the load stable
- Padded top handle for carrying by hand
- Luggage strap: slides over your suitcase handle
Specifications
| Dimensions | 40 x 20 x 25 cm |
|---|---|
| Capacity | 20 litres |
| Laptop | Up to 14″ |
| Opening | 180°, suitcase-style |
| Material | High-density, water-resistant polyester |
| Carrying | Airflow back, wide padded adjustable straps, chest strap, padded handle |
| Practical | Luggage strap, anti-theft pocket |
| Colours | 7 colours |
Which size should you choose?
Same design, three sizes to suit your airline and trip length.
| 20L · 40x20x25 | 24L · 40x30x20 | 30L · 45x36x20 | |
|---|---|---|---|
| Best for | Ryanair, Vueling, weekends | Max free size on Ryanair and Wizz Air | easyJet, week-long trips |
| Recommended trip length | 2 to 4 days | 3 to 5 days | 4 to 6 days |
| Laptop | 14″ | 15.6″ | 15.6″ |
| You are here | See the 24L | See the 30L |
Also available in the Classic version with a USB port: discover the KLOSTAIN 20L Classic.
Frequently asked questions
Will it really fit Ryanair’s sizer?
Yes. At 40 x 20 x 25 cm it stays within the free personal item size on both Ryanair (40 x 30 x 20 cm) and easyJet (45 x 36 x 20 cm). Just avoid overstuffing it until it bulges.
How many days’ worth of clothes can I pack?
2 to 4 days for most travellers, thanks to the compression strap. For a full week, the 30L will be more comfortable.
Can I carry a laptop?
Yes, a separate compartment holds a laptop up to 14″, with pockets for the charger and cables. For a 15.6″ laptop, choose the Premium 24L or 30L.
Is it comfortable when full?
The back is padded with airflow channels, the shoulder straps are wide and adjustable, and the chest strap spreads the weight. It’s easy to carry through a whole day of travel.
Can airline size limits change?
Yes, airlines sometimes update their rules. Always check the size shown on your booking before you fly.
What if the bag isn’t right for me?
You’re covered by our 14-day money-back guarantee.
Your next flight, with no baggage fees
Choose your colour and check out the current offer.
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