Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L vs Waterfly TransformerX Ultralight Packable Backpack 20L
The Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L is 20L and 0.34kg0.7lb; the Waterfly TransformerX Ultralight Packable Backpack 20L is 20L and 0.29kg0.6lb. The Waterfly TransformerX Ultralight Packable Backpack 20L is 0.05kg0.1lb lighter. The Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L costs $4 less. The Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L fits the carry-on limit of 36 of 36 major airlines and the Waterfly TransformerX Ultralight Packable Backpack 20L fits 36; under the seat, 9 and 9 of 26.
| Spec | Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L | Waterfly TransformerX Ultralight Packable Backpack 20L |
|---|---|---|
| Price | $21.99Best | $25.99 |
| Volume | 20L | 20L |
| Weight | 0.34kg0.7lb | 0.29kg0.6lbBest |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 35% | 35% |
| Dimensions | 41.9×29×15.5cm16.5×11.5×6in | 42.9×29×14cm17×11.5×5.5in |
| Bottle pockets | 2 | 2 |
| Opening | Zippered main compartment | Zippered main compartment |
| Warranty | 10 years | 10 years |
| Organizer | No | 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 | Abrasion and tear-resistant polyester, polyester lining | Tear-resistant, water-resistant nylon, polyester lining |
| Last checked | 2026-10 | 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.