Gossamer Gear Minimalist 19 Daypack vs Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L
The Gossamer Gear Minimalist 19 Daypack is 19L and 0.33kg0.7lb; the Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L is 20L and 0.34kg0.7lb. The Gossamer Gear Minimalist 19 Daypack is 0.01kg0lb lighter. The Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L costs $47.010000000000005 less. The Gossamer Gear Minimalist 19 Daypack fits the carry-on limit of 36 of 36 major airlines and the Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L fits 36; under the seat, 0 and 9 of 26.
| Spec | Gossamer Gear Minimalist 19 Daypack | Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L |
|---|---|---|
| Price | $69 | $21.99Best |
| Volume | 19L | 20L |
| Weight | 0.33kg0.7lbBest | 0.34kg0.7lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 0% | 35%Best |
| Dimensions | 47.5×27.5×9cm18.5×11×3.5in | 41.9×29×15.5cm16.5×11.5×6in |
| Laptop | sleeve, size not published | n/a |
| Compartments | 1 | n/a |
| Bottle pockets | 2 | 2 |
| Opening | n/a | Zippered main compartment |
| Warranty | 1 year | 10 years |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | Yes | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | Insert sold separately | No |
| Sternum strap | Yes | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 70D recycled Robic nylon, PFAS free | Abrasion and tear-resistant polyester, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Gossamer Gear Minimalist 19 Daypack | Waterfly TransformerX 3.0 UltraLight Packable Backpack 20L |
|---|---|---|---|
| Air Canada | Personal item | Too big | Fits |
| Allegiant Air | Personal item | Too big | Fits |
| American Airlines | Personal item | Too big | Fits |
| British Airways | Personal item | Too big | Fits |
| easyJet | Personal item | Too big | Fits |
| Frontier Airlines | Personal item | Too big | Fits |
| JetBlue Airways | Personal item | Too big | Fits |
| LATAM Airlines | Personal item | Too big | Fits |
| Volaris | Personal item | 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.