Lowepro Flipside 500 AW II vs Peak Design Travel Backpack 45L
The Lowepro Flipside 500 AW II is 35L and 2.05kg4.5lb; the Peak Design Travel Backpack 45L is 35L and 2kg4.4lb. The Peak Design Travel Backpack 45L is 0.05kg0.1lb lighter. The Lowepro Flipside 500 AW II costs $1 less. The Lowepro Flipside 500 AW II fits the carry-on limit of 0 of 36 major airlines and the Peak Design Travel Backpack 45L fits 5; under the seat, 0 and 0 of 26.
| Spec | Lowepro Flipside 500 AW II | Peak Design Travel Backpack 45L |
|---|---|---|
| Price | $299Best | $300 |
| Volume | 35L | 35L |
| Expands to | n/a | 45L |
| Weight | 2.05kg4.5lb | 2kg4.4lbBest |
| Carry-on compliance | 0% | 14%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 55×32.5×32cm21.5×13×12.5in | 56×33×24cm22×13×9.5in |
| Laptop | 15" | 16"Best |
| Compartments | n/a | 6 |
| Bottle pockets | 2 | 2 |
| Opening | Panel access, back panel | Panel access, rear hatch |
| Warranty | n/a | Lifetime |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | Yes |
| Water-resistant | No | Yes |
| Rain cover | Yes | No |
| MOLLE | No | No |
| Hip belt | No | Yes |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | Yes |
| Camera compartment | Yes | Insert sold separately |
| Material | ripstop polyester | Weatherproof 100% recycled 400-denier nylon canvas shell with 900-denier waterproof bottom liner; anodized aluminum frame; Coyote colorway uses recycled-fishing-net X-Pac VX-21 |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Lowepro Flipside 500 AW II | Peak Design Travel Backpack 45L |
|---|---|---|---|
| British Airways | Carry-on | Too big | Fits |
| easyJet | Carry-on | Too big | Fits |
| Frontier Airlines | Carry-on | Too big | Fits |
| Singapore Airlines | Carry-on | Too big | Fits |
| Southwest Airlines | 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.