Freitag F253 Kowalski vs Pacsafe E 18L Anti-Theft Backpack
The Freitag F253 Kowalski is 18L and 0.74kg1.6lb; the Pacsafe E 18L Anti-Theft Backpack is 18L and 0.72kg1.6lb. The Pacsafe E 18L Anti-Theft Backpack is 0.02kg0lb lighter. The Pacsafe E 18L Anti-Theft Backpack costs $100.05000000000001 less. The Freitag F253 Kowalski fits the carry-on limit of 36 of 36 major airlines and the Pacsafe E 18L Anti-Theft Backpack fits 36; under the seat, 7 and 8 of 26.
| Spec | Freitag F253 Kowalski | Pacsafe E 18L Anti-Theft Backpack |
|---|---|---|
| Price | $300 | $199.95Best |
| Volume | 18L | 18L |
| Weight | 0.74kg1.6lb | 0.72kg1.6lbBest |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 27% | 31%Best |
| Dimensions | 38×33.5×11cm15×13×4.5in | 42.9×26.9×19.1cm17×10.5×7.5in |
| Laptop | 16"Best | 13" |
| Bottle pockets | n/a | 2 |
| Warranty | n/a | 5 years |
| Organizer | No | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | Yes |
| Frame sheet | No | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | Removable |
| Sternum strap | No | Yes |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | Used truck tarpaulin (polyester/PVC), 100% upcycled, recycled PET lining | 320D ECONYL regenerated nylon Taslon, water resistant 1000mm, PFC-free; 75D recycled polyester ripstop lining |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Freitag F253 Kowalski | Pacsafe E 18L Anti-Theft Backpack |
|---|---|---|---|
| JetBlue Airways | Personal item | 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.