Aer Pro Pack 20L vs Nordace Siena Pro 15 Backpack
The Aer Pro Pack 20L is 20L and 1.09kg2.4lb; the Nordace Siena Pro 15 Backpack is 20L and 1.1kg2.4lb. The Aer Pro Pack 20L is 0.01kg0lb lighter. The Nordace Siena Pro 15 Backpack costs $59 less. The Aer Pro Pack 20L fits the carry-on limit of 36 of 36 major airlines and the Nordace Siena Pro 15 Backpack fits 36; under the seat, 7 and 8 of 26.
| Spec | Aer Pro Pack 20L | Nordace Siena Pro 15 Backpack |
|---|---|---|
| Price | $179 | $120Best |
| Volume | 20L | 20L |
| Weight | 1.09kg2.4lbBest | 1.1kg2.4lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 27% | 31%Best |
| Dimensions | 45×30.5×14cm17.5×12×5.5in | 43×29×18cm17×11.5×7in |
| Laptop | 16"Best | 15.6" |
| Bottle pockets | 2 | 1 |
| Opening | Wide-access main compartment | n/a |
| Warranty | Lifetime | n/a |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | Yes | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | No | No |
| Material | 840D CORDURA re/cor recycled nylon exterior (bluesign approved), recycled nylon lining (bluesign approved), YKK zippers, Duraflex hardware | Polyester and microfiber leather, 210D lining |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Aer Pro Pack 20L | Nordace Siena Pro 15 Backpack |
|---|---|---|---|
| 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.