Aer Pro Sling vs Boundary Supply Rift Sling
The Aer Pro Sling is 4.5L and 0.27kg0.6lb; the Boundary Supply Rift Sling is 4.5L and 0.31kg0.7lb. The Aer Pro Sling is 0.04kg0.1lb lighter. The Aer Pro Sling costs $15 less. The Aer Pro Sling fits the carry-on limit of 36 of 36 major airlines and the Boundary Supply Rift Sling fits 36; under the seat, 26 and 26 of 26.
| Spec | Aer Pro Sling | Boundary Supply Rift Sling |
|---|---|---|
| Price | $79Best | $94 |
| Volume | 4.5L | 4.5L |
| Weight | 0.27kg0.6lbBest | 0.31kg0.7lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 100% | 100% |
| Dimensions | 17.5×29×9cm7×11.5×3.5in | 15.2×27.9×7.6cm6×11×3in |
| 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 | Insert sold separately |
| Material | 840D CORDURA re/cor recycled nylon exterior (bluesign approved), recycled nylon lining (bluesign approved), YKK zippers, Duraflex hardware | Waterproof 400D HT nylon with TPU inner coating and DWR finish |
| 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.