Mystery Ranch Blitz 35 vs Peak Design Travel Backpack 45L
The Mystery Ranch Blitz 35 is 35.8L and 2kg4.4lb; the Peak Design Travel Backpack 45L is 35L and 2kg4.4lb. They weigh the same. The Peak Design Travel Backpack 45L costs $29 less. The Mystery Ranch Blitz 35 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 | Mystery Ranch Blitz 35 | Peak Design Travel Backpack 45L |
|---|---|---|
| Price | $329 | $300Best |
| Volume | 35.8L | 35L |
| Expands to | n/a | 45L |
| Weight | 2kg4.4lb | 2kg4.4lb |
| Carry-on compliance | 0% | 14%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 53×32×37cm21×12.5×14.5in | 56×33×24cm22×13×9.5in |
| Laptop | 15" | 16"Best |
| Compartments | n/a | 6 |
| Bottle pockets | n/a | 2 |
| Opening | Top-loading, Top shroud access with an offset vertical side zip to the main bag, plus body-panel zip to the laptop sleeve | Panel access, rear hatch |
| Warranty | Lifetime | Lifetime |
| Sizes | S/M, L/XL | n/a |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | Yes | Yes |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | Yes | No |
| Hip belt | Removable | Yes |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | Yes |
| Camera compartment | No | Insert sold separately |
| Bike-ready | No | No |
| Material | CORDURA fabric; YKK AquaGuard water-repellent zippers | 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 | Mystery Ranch Blitz 35 | 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.