Ortlieb Light-Pack vs Waterfly TransformerX 6.0 UltraLight Packable Backpack 25L
The Ortlieb Light-Pack is 25L and 0.33kg0.7lb; the Waterfly TransformerX 6.0 UltraLight Packable Backpack 25L is 25L and 0.27kg0.6lb. The Waterfly TransformerX 6.0 UltraLight Packable Backpack 25L is 0.06kg0.1lb lighter. The Waterfly TransformerX 6.0 UltraLight Packable Backpack 25L costs $120.01 less. The Ortlieb Light-Pack fits the carry-on limit of 36 of 36 major airlines and the Waterfly TransformerX 6.0 UltraLight Packable Backpack 25L fits 36; under the seat, 0 and 0 of 26.
| Spec | Ortlieb Light-Pack | Waterfly TransformerX 6.0 UltraLight Packable Backpack 25L |
|---|---|---|
| Price | $150 | $29.99Best |
| Volume | 25L | 25L |
| Weight | 0.33kg0.7lb | 0.27kg0.6lbBest |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 47×25.9×15.5cm18.5×10×6in | 47×31×17cm18.5×12×6.5in |
| Laptop | no laptop sleeve | n/a |
| Compartments | n/a | 2 |
| Bottle pockets | n/a | 2 |
| Opening | Roll-top, roll closure | Zippered main compartment |
| Warranty | 5 years | 10 years |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | 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 |
| Material | PU-coated nylon (PS21) | Eco-friendly nylon, 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.