Gossamer Gear G4-20 Ultralight 42 Backpack vs ULA Equipment UltraGrid Nexus
The Gossamer Gear G4-20 Ultralight 42 Backpack is 42L and 0.7kg1.5lb; the ULA Equipment UltraGrid Nexus is 40L and 0.61kg1.3lb. The ULA Equipment UltraGrid Nexus is 0.09kg0.2lb lighter. The Gossamer Gear G4-20 Ultralight 42 Backpack costs $14.990000000000009 less. The Gossamer Gear G4-20 Ultralight 42 Backpack fits the carry-on limit of 3 of 36 major airlines and the ULA Equipment UltraGrid Nexus fits 35; under the seat, 0 and 0 of 26.
| Spec | Gossamer Gear G4-20 Ultralight 42 Backpack | ULA Equipment UltraGrid Nexus |
|---|---|---|
| Price | $205Best | $219.99 |
| Volume | 42L | 40L |
| Weight | 0.7kg1.5lb | 0.61kg1.3lbBest |
| Carry-on compliance | 8% | 97%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 59.9×29×11.9cm23.5×11.5×4.5in | 54.6×29.2×16.5cm21.5×11.5×6.5in |
| Laptop | no laptop sleeve | n/a |
| Compartments | 1 | 1 |
| Opening | Roll-top, Extendable roll top with dual closure options | Top-loading, Extension collar with Y-strap closure |
| Warranty | 1 year | Lifetime |
| Torso length | 29.2 to 59.7cm (11.5 to 23.5in) | 38 to 61cm (15 to 24in) |
| Sizes | Small, Medium, Large | S, M, L |
| Fit | n/a | Unisex |
| 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 | Yes | Yes |
| Sternum strap | No | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 70D and 100D recycled Robic nylon, PFAS free | Challenge UltraGrid (recycled nylon), Venom Mesh front pocket |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Gossamer Gear G4-20 Ultralight 42 Backpack | ULA Equipment UltraGrid Nexus |
|---|---|---|---|
| Air Arabia | Carry-on | Too big | Fits |
| Air Canada | Carry-on | Too big | Fits |
| Air France | Carry-on | Too big | Fits |
| Air India | Carry-on | Too big | Fits |
| AirAsia | Carry-on | Too big | Fits |
| Alaska Airlines | Carry-on | Too big | Fits |
| Allegiant Air | Carry-on | Too big | Fits |
| American Airlines | Carry-on | Too big | Fits |
| ANA (All Nippon Airways) | Carry-on | Too big | Fits |
| Avianca | Carry-on | Too big | Fits |
| British Airways | Carry-on | Too big | Fits |
| Cebu Pacific | Carry-on | Too big | Fits |
| Delta Air Lines | Carry-on | Too big | Fits |
| easyJet | Carry-on | Too big | Fits |
| Emirates | Carry-on | Too big | Fits |
| Gol Linhas Aereas | Carry-on | Too big | Fits |
| IndiGo | Carry-on | Too big | Fits |
| JetBlue Airways | Carry-on | Too big | Fits |
| KLM | Carry-on | Too big | Fits |
| LATAM Airlines | Carry-on | Too big | Fits |
| Lufthansa | Carry-on | Too big | Fits |
| Norwegian Air Shuttle | Carry-on | Too big | Fits |
| Qantas | Carry-on | Too big | Fits |
| Ryanair | Carry-on | Too big | Fits |
| SAS | Carry-on | Too big | Fits |
| Turkish Airlines | Carry-on | Too big | Fits |
| United Airlines | Carry-on | Too big | Fits |
| Vietjet Air | Carry-on | Too big | Fits |
| Volaris | Carry-on | Too big | Fits |
| Vueling | Carry-on | Too big | Fits |
| WestJet | Carry-on | Too big | Fits |
| Wizz Air | Carry-on | 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.