ATD Supply ATD2 vs Harber London Office Backpack
The ATD Supply ATD2 is 18L and 1.3kg2.9lb; the Harber London Office Backpack is 18L and 1.3kg2.9lb. They weigh the same. The ATD Supply ATD2 costs $63 less. The ATD Supply ATD2 fits the carry-on limit of 36 of 36 major airlines and the Harber London Office Backpack fits 36; under the seat, 7 and 9 of 26.
| Spec | ATD Supply ATD2 | Harber London Office Backpack |
|---|---|---|
| Price | $456Best | $519 |
| Volume | 18L | 18L |
| Expands to | 31L | n/a |
| Weight | 1.3kg2.9lb | 1.3kg2.9lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 27% | 35%Best |
| Dimensions | 45×25×19cm17.5×10×7.5in | 43×29.5×14cm17×11.5×5.5in |
| Laptop | 15" | 16"Best |
| Opening | Roll-top, expandable roll top with Fidlock magnetic buckle, U-shaped back panel zip for top, side and clamshell access | n/a |
| Warranty | Lifetime | 1 year |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | Removable | No |
| Water-resistant | Yes | Yes |
| Rain cover | No | No |
| MOLLE | Yes | No |
| Hip belt | Removable | No |
| Sternum strap | Removable | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | Challenge Sailcloth Ecopak EPLX600 waterproof laminate (100% post-consumer recycled polyester), RBC 200 lining, YKK zippers | Full-grain leather and water-resistant fabric made of recycled plastic bottles |
| Last checked | 2026-10 | 2026-10 |
Where their airline fit differs
| Airline | Limit | ATD Supply ATD2 | Harber London Office Backpack |
|---|---|---|---|
| Air Canada | Personal item | Too big | Fits |
| 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.