Aer Street Sling vs Boundary Supply Rennen Sling
The Aer Street Sling is 2.4L and 0.27kg0.6lb; the Boundary Supply Rennen Sling is 2.5L and 0.27kg0.6lb. They weigh the same. The Boundary Supply Rennen Sling costs $10 less. The Aer Street Sling fits the carry-on limit of 36 of 36 major airlines and the Boundary Supply Rennen Sling fits 36; under the seat, 26 and 26 of 26.
| Spec | Aer Street Sling | Boundary Supply Rennen Sling |
|---|---|---|
| Price | $69 | $59Best |
| Volume | 2.4L | 2.5L |
| Weight | 0.27kg0.6lb | 0.27kg0.6lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 100% | 100% |
| Dimensions | 20×14×8cm8×5.5×3in | 14×25.4×7.6cm5.5×10×3in |
| Laptop | no laptop sleeve | no laptop sleeve |
| Opening | n/a | zip top |
| Warranty | Lifetime | Lifetime |
| Organizer | Yes | No |
| 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 | Removable | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 1680D CORDURA ballistic nylon exterior (bluesign approved), ripstop nylon interior (bluesign approved), YKK zippers, Duraflex hardware | RE-3 recycled Cordura Eco fabric, ripstop nylon lining with DWR |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
Both bags pass and fail the same airline size limits.
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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.