Kapten & Son Tromso 12L vs Lowepro Flipside Trek BP 250 AW
The Kapten & Son Tromso 12L is 12L and 1kg2.2lb; the Lowepro Flipside Trek BP 250 AW is 12L and 1.06kg2.3lb. The Kapten & Son Tromso 12L is 0.06kg0.1lb lighter. The Kapten & Son Tromso 12L fits the carry-on limit of 36 of 36 major airlines and the Lowepro Flipside Trek BP 250 AW fits 36; under the seat, 20 and 7 of 26.
| Spec | Kapten & Son Tromso 12L | Lowepro Flipside Trek BP 250 AW |
|---|---|---|
| Price | n/a | $239 |
| Volume | 12L | 12L |
| Weight | 1kg2.2lbBest | 1.06kg2.3lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 77%Best | 27% |
| Dimensions | 36×29×12cm14×11.5×4.5in | 44×25.5×17cm17.5×10×6.5in |
| Laptop | 13" | no laptop sleeve |
| Compartments | n/a | 2 |
| Opening | Flap with magnet and zip | Panel access, body-side + top |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| Rain cover | No | Yes |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | Yes |
| Material | 60% PU, 40% recycled PET | nylon |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Kapten & Son Tromso 12L | Lowepro Flipside Trek BP 250 AW |
|---|---|---|---|
| Air Canada | Personal item | Fits | Too big |
| Air France | Personal item | Fits | Too big |
| ANA (All Nippon Airways) | Personal item | Fits | Too big |
| JetBlue Airways | Personal item | Fits | Too big |
| KLM | Personal item | Fits | Too big |
| Lufthansa | Personal item | Fits | Too big |
| Norwegian Air Shuttle | Personal item | Fits | Too big |
| Ryanair | Personal item | Fits | Too big |
| SAS | Personal item | Fits | Too big |
| Turkish Airlines | Personal item | Fits | Too big |
| Vueling | Personal item | Fits | Too big |
| WestJet | Personal item | Fits | Too big |
| Wizz Air | Personal item | Fits | Too big |
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Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.