Black Briar Zappy 1.0 20L vs Nordace Siena Pro 15 Backpack
The Black Briar Zappy 1.0 20L is 20L and 1.12kg2.5lb; the Nordace Siena Pro 15 Backpack is 20L and 1.1kg2.4lb. The Nordace Siena Pro 15 Backpack is 0.02kg0lb lighter. The Nordace Siena Pro 15 Backpack costs $229.99 less. The Black Briar Zappy 1.0 20L fits the carry-on limit of 36 of 36 major airlines and the Nordace Siena Pro 15 Backpack fits 36; under the seat, 1 and 8 of 26.
| Spec | Black Briar Zappy 1.0 20L | Nordace Siena Pro 15 Backpack |
|---|---|---|
| Price | $349.99 | $120Best |
| Volume | 20L | 20L |
| Weight | 1.12kg2.5lb | 1.1kg2.4lbBest |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 4% | 31%Best |
| Dimensions | 46×29×11.9cm18×11.5×4.5in | 43×29×18cm17×11.5×7in |
| Laptop | sleeve, size not published | 15.6" |
| Bottle pockets | n/a | 1 |
| Opening | Clamshell, opens 180 degrees | n/a |
| Warranty | 1 year | n/a |
| Organizer | Yes | Yes |
| 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 | No | No |
| Sternum strap | No | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | Yes |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | Drycoatex Nylon 100% fabric | Polyester and microfiber leather, 210D lining |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Black Briar Zappy 1.0 20L | Nordace Siena Pro 15 Backpack |
|---|---|---|---|
| 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 |
| 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.