Osprey Daylite Cinch vs Waterfly SUMMIT-X UltraLight Packable Backpack 15L
The Osprey Daylite Cinch is 15L and 0.34kg0.7lb; the Waterfly SUMMIT-X UltraLight Packable Backpack 15L is 15L and 0.31kg0.7lb. The Waterfly SUMMIT-X UltraLight Packable Backpack 15L is 0.03kg0.1lb lighter. The Waterfly SUMMIT-X UltraLight Packable Backpack 15L costs $25.009999999999998 less. The Osprey Daylite Cinch fits the carry-on limit of 36 of 36 major airlines and the Waterfly SUMMIT-X UltraLight Packable Backpack 15L fits 36; under the seat, 9 and 9 of 26.
| Spec | Osprey Daylite Cinch | Waterfly SUMMIT-X UltraLight Packable Backpack 15L |
|---|---|---|
| Price | $60 | $34.99Best |
| Volume | 15L | 15L |
| Weight | 0.34kg0.7lb | 0.31kg0.7lbBest |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 35% | 35% |
| Dimensions | 41×24×19cm16×9.5×7.5in | 41.9×27.9×11.9cm16.5×11×4.5in |
| Laptop | no laptop sleeve | n/a |
| Bottle pockets | 0 | 2 |
| Opening | Top-loading, top-loading access with cinch closure | Zippered main compartment |
| Warranty | Lifetime | 10 years |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | Yes | No |
| Frame sheet | No | No |
| Water-resistant | Yes | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | Removable | No |
| Sternum strap | Yes | Yes |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | No |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | bluesign approved 150D recycled polyester with PFC-free DWR, 600D recycled polyester lining and bottom | Tear-resistant, water-repellent nylon, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Osprey Daylite Cinch | Waterfly SUMMIT-X UltraLight Packable Backpack 15L |
|---|---|---|---|
| Air Canada | Personal item | Too big | Fits |
| United Airlines | Personal item | 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.