Aer City Sling 3 vs Kapten & Son Visby 1.2L
The Aer City Sling 3 is 2L and 0.37kg0.8lb; the Kapten & Son Visby 1.2L is 1.2L and 0.4kg0.9lb. The Aer City Sling 3 is 0.03kg0.1lb lighter. The Aer City Sling 3 fits the carry-on limit of 36 of 36 major airlines and the Kapten & Son Visby 1.2L fits 36; under the seat, 25 and 26 of 26.
| Spec | Aer City Sling 3 | Kapten & Son Visby 1.2L |
|---|---|---|
| Price | $89 | n/a |
| Volume | 2L | 1.2L |
| Weight | 0.37kg0.8lbBest | 0.4kg0.9lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 96% | 100%Best |
| Dimensions | 12×33×7.5cm4.5×13×3in | 12×18.5×6cm4.5×7.5×2.5in |
| Laptop | n/a | no laptop sleeve |
| Opening | n/a | Zipper, Magnet |
| Warranty | Lifetime | n/a |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | 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 | 1680D CORDURA ballistic nylon exterior (bluesign approved), lightweight nylon ripstop liner (bluesign approved), YKK zippers, Duraflex hardware | 60% PU, 40% recycled PET |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Aer City Sling 3 | Kapten & Son Visby 1.2L |
|---|---|---|---|
| Vietjet Air | 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.