Heimplanet Transit Line Sling Pocket vs Knack Expandable Sling
The Heimplanet Transit Line Sling Pocket is 2L and 0.2kg0.4lb; the Knack Expandable Sling is 1.9L and 0.2kg0.4lb. They weigh the same. The Heimplanet Transit Line Sling Pocket fits the carry-on limit of 36 of 36 major airlines and the Knack Expandable Sling fits 36; under the seat, 26 and 26 of 26.
| Spec | Heimplanet Transit Line Sling Pocket | Knack Expandable Sling |
|---|---|---|
| Price | n/a | $55 |
| Volume | 2L | 1.9L |
| Expands to | n/a | 2.3L |
| Weight | 0.2kg0.4lb | 0.2kg0.4lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 100% | 100% |
| Dimensions | 15×25×8cm6×10×3in | 15.2×22.9×6.4cm6×9×2.5in |
| Laptop | no laptop sleeve | no laptop sleeve |
| Opening | zip main compartment | zip top |
| Warranty | Lifetime | n/a |
| Organizer | Yes | No |
| 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 | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | Dyecoshell 840D x 660D spun-dyed nylon, PU coated with DWR; spun-dyed polyester lining; YKK zippers | Water-resistant 420D high-density nylon, 150D antimicrobial nylon lining |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
Both bags pass and fail the same airline size limits.
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.