Aer Travel Sling 2 vs Zefal Urban Messenger
The Aer Travel Sling 2 is 12L and 0.82kg1.8lb; the Zefal Urban Messenger is 11L and 0.84kg1.9lb. The Aer Travel Sling 2 is 0.02kg0lb lighter. The Aer Travel Sling 2 fits the carry-on limit of 36 of 36 major airlines and the Zefal Urban Messenger fits 36; under the seat, 10 and 20 of 26.
| Spec | Aer Travel Sling 2 | Zefal Urban Messenger |
|---|---|---|
| Price | $119 | n/a |
| Volume | 12L | 11L |
| Weight | 0.82kg1.8lbBest | 0.84kg1.9lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 38% | 77%Best |
| Dimensions | 28×41×12cm11×16×4.5in | 35×30×13cm14×12×5in |
| Laptop | 16" | n/a |
| Opening | n/a | Top-loading, Zip closure with magnetic snaps |
| Warranty | Lifetime | n/a |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | No | Yes |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | Yes |
| Luggage pass-through | Yes | No |
| Camera compartment | No | No |
| Bike-ready | No | Yes |
| Material | 1680D CORDURA ballistic nylon exterior, YKK zippers, Duraflex hardware | RPET |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Aer Travel Sling 2 | Zefal Urban Messenger |
|---|---|---|---|
| Air France | Personal item | Too big | Fits |
| ANA (All Nippon Airways) | Personal item | Too big | Fits |
| KLM | Personal item | Too big | Fits |
| Lufthansa | Personal item | Too big | Fits |
| Norwegian Air Shuttle | Personal item | Too big | Fits |
| Ryanair | Personal item | Too big | Fits |
| SAS | Personal item | Too big | Fits |
| Turkish Airlines | Personal item | Too big | Fits |
| Vueling | Personal item | Too big | Fits |
| Wizz 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.