Bellroy Via Backpack 20L vs Gregory Retna 20
The Bellroy Via Backpack 20L is 20L and 0.55kg1.2lb; the Gregory Retna 20 is 20L and 0.54kg1.2lb. The Gregory Retna 20 is 0.01kg0lb lighter. The Bellroy Via Backpack 20L fits the carry-on limit of 29 of 36 major airlines and the Gregory Retna 20 fits 32; under the seat, 3 and 0 of 26.
| Spec | Bellroy Via Backpack 20L | Gregory Retna 20 |
|---|---|---|
| Volume | 20L | 20L |
| Weight | 0.55kg1.2lb | 0.54kg1.2lbBest |
| Carry-on compliance | 81% | 89%Best |
| Personal-item compliance | 12%Best | 0% |
| Dimensions | 45×36×12cm17.5×14×4.5in | 50×29×21cm19.5×11.5×8.5in |
| Laptop | 16"Best | 15" |
| Bottle pockets | n/a | 1 |
| Opening | Panel access, drop-down front panel | n/a |
| Warranty | 6 years | 50 years |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | No | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | Ribba Weave (75% recycled polyester, 15% nylon) | 100% recycled 300D polyester ripstop with PFAS-free C0 DWR, 135D recycled polyester lining |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Bellroy Via Backpack 20L | Gregory Retna 20 |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air France | Carry-on | Too big | Fits |
| Air India | Carry-on | Fits | Too big |
| Avianca | Carry-on | Too big | Fits |
| British Airways | Personal item | Fits | Too big |
| easyJet | Personal item | Fits | Too big |
| Frontier Airlines | Personal item | Fits | Too big |
| 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 |
| Ryanair | Carry-on | Fits | Too big |
| United Airlines | Carry-on | Too big | Fits |
| Vueling | 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.