Gossamer Gear Fast Kumo 36 Fastpack vs Gossamer Gear Murmur 36 Hyperlight Backpack
The Gossamer Gear Fast Kumo 36 Fastpack is 36L and 0.61kg1.3lb; the Gossamer Gear Murmur 36 Hyperlight Backpack is 36L and 0.3kg0.7lb. The Gossamer Gear Murmur 36 Hyperlight Backpack is 0.31kg0.7lb lighter. The Gossamer Gear Fast Kumo 36 Fastpack costs $160 less. The Gossamer Gear Fast Kumo 36 Fastpack fits the carry-on limit of 36 of 36 major airlines and the Gossamer Gear Murmur 36 Hyperlight Backpack fits 35; under the seat, 1 and 0 of 26.
| Spec | Gossamer Gear Fast Kumo 36 Fastpack | Gossamer Gear Murmur 36 Hyperlight Backpack |
|---|---|---|
| Price | $190Best | $350 |
| Volume | 36L | 36L |
| Weight | 0.61kg1.3lb | 0.3kg0.7lbBest |
| Carry-on compliance | 100%Best | 97% |
| Personal-item compliance | 4%Best | 0% |
| Dimensions | 45.7×27×11.4cm18×10.5×4.5in | 53×28×13cm21×11×5in |
| Laptop | no laptop sleeve | no laptop sleeve |
| Compartments | 1 | 1 |
| Bottle pockets | n/a | 2 |
| Opening | Over-the-top closure | Roll-top, Roll top with side connection points |
| Warranty | 1 year | 1 year |
| Sizes | S/M, M/L | n/a |
| Organizer | No | No |
| Shoe compartment | No | No |
| Hydration sleeve | Yes | No |
| Frame sheet | No | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | Removable | Insert sold separately |
| Sternum strap | Yes | Yes |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 70D Robic nylon top, 100D Robic nylon bottom | ALUULA Graflyte V52 (100% polyethylene), PFAS free |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Gossamer Gear Fast Kumo 36 Fastpack | Gossamer Gear Murmur 36 Hyperlight Backpack |
|---|---|---|---|
| Frontier Airlines | Personal item | Fits | Too big |
| Qatar Airways | 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.