ALPAKA Traverse Backpack (30L) vs Knack Series 2 Large Expandable Pack
The ALPAKA Traverse Backpack (30L) is 30L and 1.5kg3.3lb; the Knack Series 2 Large Expandable Pack is 30L and 1.5kg3.3lb. They weigh the same. The ALPAKA Traverse Backpack (30L) costs $96 less. The ALPAKA Traverse Backpack (30L) fits the carry-on limit of 36 of 36 major airlines and the Knack Series 2 Large Expandable Pack fits 28; under the seat, 0 and 0 of 26.
| Spec | ALPAKA Traverse Backpack (30L) | Knack Series 2 Large Expandable Pack |
|---|---|---|
| Price | $199Best | $295 |
| Volume | 30L | 30L |
| Expands to | n/a | 46L |
| Weight | 1.5kg3.3lb | 1.5kg3.3lb |
| Carry-on compliance | 100%Best | 78% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 47×28×18cm18.5×11×7in | 55×36×11cm21.5×14×4.5in |
| Laptop | 16" | 17"Best |
| Bottle pockets | 1 | 1 |
| Compression straps | 0 | 0 |
| Opening | Clamshell | n/a |
| Warranty | Lifetime | 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 | Removable |
| Sternum strap | Yes | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Hideable |
| Camera compartment | No | No |
| Material | Axoflux 400D ripstop nylon (X-Pac VX42/X42 version $269) | 420D high-density nylon with PU coating, 840D ballistic nylon base |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | ALPAKA Traverse Backpack (30L) | Knack Series 2 Large Expandable Pack |
|---|---|---|---|
| Air France | Carry-on | Fits | Too big |
| Avianca | Carry-on | Fits | Too big |
| Gol Linhas Aereas | Carry-on | Fits | Too big |
| IndiGo | Carry-on | Fits | Too big |
| KLM | Carry-on | Fits | Too big |
| LATAM Airlines | Carry-on | Fits | Too big |
| Qatar Airways | Carry-on | Fits | Too big |
| United Airlines | Carry-on | Fits | Too big |
Add more bags to this comparison
Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.