Knack travel bags
We track 10 Knack travel bags. 5 fit the cabin-bag limit of at least 90% of the airlines we track. The lightest is the Expandable Sling at 0.2kg0.4lb. Knack publishes no warranty for its backpacks. Warranty checked September 2026.
| Bag | Type | Volume | Weight | Dimensions | Carry-on fit | Price |
|---|---|---|---|---|---|---|
| Knack Expandable Sling | Sling | 1.9L | 0.2kg0.4lb | 15.2×22.9×6.4cm6×9×2.5in | 100% | $55 |
| Knack Series 2 Small Expandable Pack | Backpack | 17L | 1.08kg2.4lb | 43.2×31.8×12.7cm17×12.5×5in | 100% | $225 |
| Knack Convertible Duffel | Duffel | 24L | 1.16kg2.6lb | 33×48.3×12.7cm13×19×5in | 100% | $275 |
| Knack Series 2 Medium Expandable Pack | Backpack | 24L | 1.4kg3.1lb | 48×30×11cm19×12×4.5in | 100% | $265 |
| Knack Expandable Laptop Tote | Tote | 18L | 0.96kg2.1lb | 33×50.8×17.8cm13×20×7in | 97% | $120 |
| Knack Expandable Metro Duffel | Duffel | 26L | 1.36kg3lb | 33×43.2×22.9cm13×17×9in | 86% | $145 |
| Knack Series 2 Large Expandable Pack | Backpack | 30L | 1.5kg3.3lb | 55×36×11cm21.5×14×4.5in | 78% | $295 |
| Knack Expandable Town Tote | Tote | 26L | 0.77kg1.7lb | 38.1×40.6×12.7cm15×16×5in | 50% | $110 |
| Knack Expandable Travel Duffel | Duffel | 35L | 1.45kg3.2lb | 30.5×48.3×25.4cm12×19×10in | 3% | $165 |
| Knack Large Expandable Travel Duffel | Duffel | 50L | 1.73kg3.8lb | 38.1×55.9×30.5cm15×22×12in | 0% | $185 |
Ranked by the share of airlines they fit, then by weight. Specs come from Knack's own product pages. How we score carry-on fit.