Dakine 365 Backpack 28L vs Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L
The Dakine 365 Backpack 28L is 28L and 0.46kg1lb; the Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L is 28L and 0.44kg1lb. The Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L is 0.02kg0lb lighter. The Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L costs $42.010000000000005 less. The Dakine 365 Backpack 28L fits the carry-on limit of 31 of 36 major airlines and the Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L fits 36; under the seat, 0 and 1 of 26.
| Spec | Dakine 365 Backpack 28L | Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L |
|---|---|---|
| Price | $68 | $25.99Best |
| Volume | 28L | 28L |
| Weight | 0.46kg1lb | 0.44kg1lbBest |
| Carry-on compliance | 86% | 100%Best |
| Personal-item compliance | 0% | 4%Best |
| Dimensions | 48×31×23cm19×12×9in | 46×31×20cm18×12×8in |
| Laptop | 15" | n/a |
| Bottle pockets | 1 | 2 |
| Opening | n/a | Main compartment pocket |
| Warranty | 10 years | 10 years |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| 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 | 84% recycled polyester, 12% nylon, 4% polyester body; polyester lining | Nylon, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Dakine 365 Backpack 28L | Waterfly TransformerX 5.0 UltraLight Packable Backpack 28L |
|---|---|---|---|
| Air Arabia | Carry-on | Too big | Fits |
| Air India | Carry-on | Too big | Fits |
| Emirates | Carry-on | Too big | Fits |
| Frontier Airlines | Personal item | Too big | Fits |
| Ryanair | Carry-on | Too big | Fits |
| Vueling | Carry-on | 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.