Exped Cloudburst 15 vs Waterfly SUMMIT-X UltraLight Packable Backpack 15L
The Exped Cloudburst 15 is 15L and 0.26kg0.6lb; the Waterfly SUMMIT-X UltraLight Packable Backpack 15L is 15L and 0.31kg0.7lb. The Exped Cloudburst 15 is 0.05kg0.1lb lighter. The Waterfly SUMMIT-X UltraLight Packable Backpack 15L costs $54.96 less. The Exped Cloudburst 15 fits the carry-on limit of 36 of 36 major airlines and the Waterfly SUMMIT-X UltraLight Packable Backpack 15L fits 36; under the seat, 7 and 9 of 26.
| Spec | Exped Cloudburst 15 | Waterfly SUMMIT-X UltraLight Packable Backpack 15L |
|---|---|---|
| Price | $89.95 | $34.99Best |
| Volume | 15L | 15L |
| Weight | 0.26kg0.6lbBest | 0.31kg0.7lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 27% | 35%Best |
| Dimensions | 43.2×17.8×15.2cm17×7×6in | 41.9×27.9×11.9cm16.5×11×4.5in |
| Laptop | no laptop sleeve | n/a |
| Compartments | 1 | n/a |
| Bottle pockets | n/a | 2 |
| Opening | Roll-top | Zippered main compartment |
| Warranty | 5 years | 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 | Yes | No |
| Sternum strap | No | Yes |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | Recycled 70D taffeta nylon, PU coated (7,000 mm water column), fully seam taped, bluesign approved; EVA foam back pad | Tear-resistant, water-repellent nylon, polyester lining |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Exped Cloudburst 15 | Waterfly SUMMIT-X UltraLight Packable Backpack 15L |
|---|---|---|---|
| Air Canada | Personal item | Too big | Fits |
| JetBlue Airways | 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.