Herschel Classic Backpack XL vs Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L
The Herschel Classic Backpack XL is 30L and 0.55kg1.2lb; the Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L is 30L and 0.42kg0.9lb. The Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L is 0.13kg0.3lb lighter. The Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L costs $43.010000000000005 less. The Herschel Classic Backpack XL fits the carry-on limit of 36 of 36 major airlines and the Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L fits 32; under the seat, 7 and 0 of 26.
| Spec | Herschel Classic Backpack XL | Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L |
|---|---|---|
| Price | $70 | $26.99Best |
| Volume | 30L | 30L |
| Weight | 0.55kg1.2lb | 0.42kg0.9lbBest |
| Carry-on compliance | 100%Best | 89% |
| Personal-item compliance | 27%Best | 0% |
| Dimensions | 45×32.5×16.5cm17.5×13×6.5in | 49×31.8×21.8cm19.5×12.5×8.5in |
| Laptop | 16" | n/a |
| Bottle pockets | 1 | 2 |
| Opening | n/a | Zippered main compartment |
| Warranty | Lifetime | 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 | 100% recycled 600D polyester, 100% recycled polyester liner | Nylon, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Herschel Classic Backpack XL | Waterfly TransformerX 2.0 UltraLight Packable Backpack 30L |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air India | Carry-on | Fits | Too big |
| Allegiant Air | Personal item | Fits | Too big |
| American Airlines | Personal item | Fits | Too big |
| British Airways | Personal item | Fits | Too big |
| easyJet | Personal item | Fits | Too big |
| Frontier Airlines | Personal item | Fits | Too big |
| LATAM Airlines | Personal item | Fits | Too big |
| Ryanair | Carry-on | Fits | Too big |
| Volaris | Personal item | Fits | Too big |
| Vueling | Carry-on | 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.