Tortuga Daypack Pro vs Waterfly Travel Elite 2-in-1 Lightweight Backpack 21L
The Tortuga Daypack Pro is 21L and 0.45kg1lb; the Waterfly Travel Elite 2-in-1 Lightweight Backpack 21L is 21L and 0.53kg1.2lb. The Tortuga Daypack Pro is 0.08kg0.2lb lighter. The Waterfly Travel Elite 2-in-1 Lightweight Backpack 21L costs $102.01 less. The Tortuga Daypack Pro fits the carry-on limit of 36 of 36 major airlines and the Waterfly Travel Elite 2-in-1 Lightweight Backpack 21L fits 32; under the seat, 7 and 0 of 26.
| Spec | Tortuga Daypack Pro | Waterfly Travel Elite 2-in-1 Lightweight Backpack 21L |
|---|---|---|
| Price | $125 | $22.99Best |
| Volume | 21L | 21L |
| Weight | 0.45kg1lbBest | 0.53kg1.2lb |
| Carry-on compliance | 100%Best | 89% |
| Personal-item compliance | 27%Best | 0% |
| Dimensions | 44×29.5×16.5cm17.5×11.5×6.5in | 43.2×26.7×20.3cm17×10.5×8in |
| Laptop | 16" | n/a |
| Bottle pockets | 2 | 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 | 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 | ECOPAK EPX70RS waterproof sailcloth | Tear-resistant, water-resistant nylon, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Tortuga Daypack Pro | Waterfly Travel Elite 2-in-1 Lightweight Backpack 21L |
|---|---|---|---|
| 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.