Ortlieb Soulo Metrosphere vs Salewa Alp Trainer 25L Backpack
The Ortlieb Soulo Metrosphere is 25L and 1.05kg2.3lb; the Salewa Alp Trainer 25L Backpack is 25L and 1.06kg2.3lb. The Ortlieb Soulo Metrosphere is 0.01kg0lb lighter. The Ortlieb Soulo Metrosphere fits the carry-on limit of 29 of 36 major airlines and the Salewa Alp Trainer 25L Backpack fits 14; under the seat, 0 and 0 of 26.
| Spec | Ortlieb Soulo Metrosphere | Salewa Alp Trainer 25L Backpack |
|---|---|---|
| Price | $245 | n/a |
| Volume | 25L | 25L |
| Weight | 1.05kg2.3lbBest | 1.06kg2.3lb |
| Carry-on compliance | 81%Best | 39% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 47×36×18cm18.5×14×7in | 55×24×27cm21.5×9.5×10.5in |
| Laptop | sleeve, size not published | n/a |
| Opening | Top-loading, magnetic lid closure | n/a |
| Warranty | 5 years | 2 years |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | Yes |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| Rain cover | No | Yes |
| MOLLE | No | No |
| Hip belt | No | Yes |
| Sternum strap | No | No |
| Load lifters | No | Yes |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | PU-coated nylon (ps33) | 100Dx280D Nylon Twill, 100D Nylon Honeycomb |
| Last checked | 2026-10 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Ortlieb Soulo Metrosphere | Salewa Alp Trainer 25L Backpack |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air Canada | Carry-on | Fits | Too big |
| Air France | Carry-on | Too big | Fits |
| Air India | Carry-on | Fits | Too big |
| AirAsia | Carry-on | Fits | Too big |
| Alaska Airlines | Carry-on | Fits | Too big |
| American Airlines | Carry-on | Fits | Too big |
| Avianca | Carry-on | Too big | Fits |
| Cebu Pacific | Carry-on | Fits | Too big |
| Delta Air Lines | Carry-on | Fits | Too big |
| Emirates | Carry-on | Fits | Too big |
| Gol Linhas Aereas | Carry-on | Too big | Fits |
| IndiGo | Carry-on | Too big | Fits |
| JetBlue Airways | Carry-on | Fits | Too big |
| KLM | Carry-on | Too big | Fits |
| LATAM Airlines | Carry-on | Too big | Fits |
| Lufthansa | Carry-on | Fits | Too big |
| Norwegian Air Shuttle | Carry-on | Fits | Too big |
| Qantas | Carry-on | Fits | Too big |
| Qatar Airways | Carry-on | Fits | Too big |
| Ryanair | Carry-on | Fits | Too big |
| SAS | Carry-on | Fits | Too big |
| Turkish Airlines | Carry-on | Fits | Too big |
| Vietjet Air | Carry-on | Fits | Too big |
| Vueling | Carry-on | Fits | Too big |
| WestJet | Carry-on | Fits | Too big |
| Wizz Air | Carry-on | 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.