Lowe Alpine AirZone Trek 28 vs Lowepro Fastpack BP 450 AW IV
The Lowe Alpine AirZone Trek 28 is 28L and 1.32kg2.9lb; the Lowepro Fastpack BP 450 AW IV is 28L and 1.4kg3.1lb. The Lowe Alpine AirZone Trek 28 is 0.08kg0.2lb lighter. The Lowe Alpine AirZone Trek 28 fits the carry-on limit of 0 of 36 major airlines and the Lowepro Fastpack BP 450 AW IV fits 14; under the seat, 0 and 0 of 26.
| Spec | Lowe Alpine AirZone Trek 28 | Lowepro Fastpack BP 450 AW IV |
|---|---|---|
| Price | n/a | $189.95 |
| Volume | 28L | 28L |
| Weight | 1.32kg2.9lbBest | 1.4kg3.1lb |
| Carry-on compliance | 0% | 39%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 55×35×28cm21.5×14×11in | 52×33×24cm20.5×13×9.5in |
| Laptop | n/a | 16" |
| Compartments | n/a | 2 |
| Bottle pockets | 2 | 2 |
| Opening | Panel access, Panel loader with zipped entry | Panel access, side access + full back panel |
| Organizer | No | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | Yes | No |
| Frame sheet | No | No |
| Water-resistant | Yes | Yes |
| Rain cover | Yes | Yes |
| MOLLE | No | No |
| Hip belt | Yes | Hideable |
| Sternum strap | Yes | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | Yes |
| Bike-ready | No | No |
| Material | 210D 6.6 Mini Ripstop / HydroShield | 600D solution-dyed polyester, recycled 420D nylon ripstop with carbonate PU coating |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Lowe Alpine AirZone Trek 28 | Lowepro Fastpack BP 450 AW IV |
|---|---|---|---|
| Air France | Carry-on | Too big | Fits |
| Allegiant Air | Carry-on | Too big | Fits |
| ANA (All Nippon Airways) | Carry-on | Too big | Fits |
| Avianca | Carry-on | Too big | Fits |
| British Airways | Carry-on | Too big | Fits |
| easyJet | Carry-on | Too big | Fits |
| Frontier Airlines | Carry-on | Too big | Fits |
| Gol Linhas Aereas | Carry-on | Too big | Fits |
| IndiGo | Carry-on | Too big | Fits |
| KLM | Carry-on | Too big | Fits |
| LATAM Airlines | Carry-on | Too big | Fits |
| Singapore Airlines | Carry-on | Too big | Fits |
| Southwest Airlines | Carry-on | Too big | Fits |
| Volaris | Carry-on | Too big | Fits |
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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.