5.11 Tactical RUSH 12 2.0 Backpack 24L vs Knack Series 2 Medium Expandable Pack
The 5.11 Tactical RUSH 12 2.0 Backpack 24L is 24L and 1.4kg3.1lb; the Knack Series 2 Medium Expandable Pack is 24L and 1.4kg3.1lb. They weigh the same. The 5.11 Tactical RUSH 12 2.0 Backpack 24L costs $110 less. The 5.11 Tactical RUSH 12 2.0 Backpack 24L fits the carry-on limit of 36 of 36 major airlines and the Knack Series 2 Medium Expandable Pack fits 36; under the seat, 1 and 0 of 26.
| Spec | 5.11 Tactical RUSH 12 2.0 Backpack 24L | Knack Series 2 Medium Expandable Pack |
|---|---|---|
| Price | $155Best | $265 |
| Volume | 24L | 24L |
| Expands to | n/a | 35L |
| Weight | 1.4kg3.1lb | 1.4kg3.1lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 4%Best | 0% |
| Dimensions | 46×28×17cm18×11×6.5in | 48×30×11cm19×12×4.5in |
| Laptop | 15" | 16"Best |
| Compartments | 3 | n/a |
| Bottle pockets | n/a | 1 |
| Opening | Top-loading, top zip | Clamshell, suitcase-style lid, lay flat |
| Warranty | Lifetime | n/a |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | Yes | No |
| Frame sheet | No | No |
| Water-resistant | Yes | Yes |
| Rain cover | No | No |
| MOLLE | Yes | No |
| Hip belt | No | No |
| Sternum strap | Yes | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | Yes |
| Camera compartment | No | No |
| Material | 1050D nylon, plain weave, 9.53 oz/yd2, DWR C0, PU coated (2 sides), HeiQ Barrier Eco Dry | 420D high-density nylon with PU coating, 840D ballistic nylon bottom |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | 5.11 Tactical RUSH 12 2.0 Backpack 24L | Knack Series 2 Medium Expandable Pack |
|---|---|---|---|
| Frontier Airlines | Personal item | 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.