Thermabuild | Underseat Cabin Backpack 45L

The Overnighter is the most capable underseat bag we've ever made. At 40x30x20 cm, it qualifies as a free personal item on Ryanair, easyJet, Wizz Air, British Airways and every major airline  fitting under the seat in front of you while carrying more than most overhead bags.

Vacuum compression technology packs 46 litres into a 40x30x20 footprint. Add the built-in +5 cm expansion when you need extra room, and you have a bag that quietly outperforms everything around it at the gate.

Inside, a dedicated 16" laptop compartment sits alongside zippered pockets, a key holder, a dry/wet separation section, and a built-in USB charging port so your devices never run out before you land. The TSA-approved lock keeps everything secure from check-in to arrival, without slowing you down at security.

Oxford cloth construction keeps the whole thing structured, protected and looking sharp — trip after trip. Want the full EasyJet experience? Our dedicated EasyJet-compliant model is built to the exact dimensions, with the same quality construction so you board stress-free, every time.

The last underseat bag you'll ever need.

• ✓ 40 × 30 × 20 cm  compliant with Ryanair, easyJet, Wizz Air, British Airways & more
• ✓ 46L capacity via vacuum compression
• ✓ +5 cm expandable
• ✓ Fits 16" laptop
• ✓ Dry/wet separation
• ✓ Key holder & zippered interior pockets
• ✓ Built-in USB charging port
• ✓ TSA-approved lock
• ✓ Oxford cloth construction
• ✓ 1.10 kg empty weight