Timbuk2 Mini Prospect Backpack vs Waterfly Adventure Nyx Rolltop Backpack 18L
The Timbuk2 Mini Prospect Backpack is 13L and 0.67kg1.5lb; the Waterfly Adventure Nyx Rolltop Backpack 18L is 13L and 0.74kg1.6lb. The Timbuk2 Mini Prospect Backpack is 0.07kg0.2lb lighter. The Waterfly Adventure Nyx Rolltop Backpack 18L costs $84.00999999999999 less. The Timbuk2 Mini Prospect Backpack fits the carry-on limit of 36 of 36 major airlines and the Waterfly Adventure Nyx Rolltop Backpack 18L fits 36; under the seat, 20 and 20 of 26.
| Spec | Timbuk2 Mini Prospect Backpack | Waterfly Adventure Nyx Rolltop Backpack 18L |
|---|---|---|
| Price | $119 | $34.99Best |
| Volume | 13L | 13L |
| Expands to | n/a | 18L |
| Weight | 0.67kg1.5lbBest | 0.74kg1.6lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 77% | 77% |
| Dimensions | 40×27×13cm15.5×10.5×5in | 38.1×27.1×13cm15×10.5×5in |
| Laptop | 13" | sleeve, size not published |
| Bottle pockets | n/a | 2 |
| Opening | Roll-top, Roll-top or flap closure | Roll-top, Roll-top main compartment with a buckle strap, plus a back zipper |
| Warranty | Lifetime | 10 years |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| 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 | n/a | Water-resistant film fabric, tear-resistant polyester, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
Both bags pass and fail the same airline size limits.
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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.