Aer Day Sling 4 Max vs Champs Luggage Onyx Sling Bag
The Aer Day Sling 4 Max is 6L and 0.5kg1.1lb; the Champs Luggage Onyx Sling Bag is 6L and 0.5kg1.1lb. They weigh the same. The Champs Luggage Onyx Sling Bag costs $10 less. The Aer Day Sling 4 Max fits the carry-on limit of 36 of 36 major airlines and the Champs Luggage Onyx Sling Bag fits 36; under the seat, 24 and 22 of 26.
| Spec | Aer Day Sling 4 Max | Champs Luggage Onyx Sling Bag |
|---|---|---|
| Price | $95 | $85Best |
| Volume | 6L | 6L |
| Weight | 0.5kg1.1lb | 0.5kg1.1lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 92%Best | 85% |
| Dimensions | 21.5×30.5×10cm8.5×12×4in | 30.5×22.9×10.8cm12×9×4.5in |
| Laptop | 11" | n/a |
| Opening | Main compartment opens wide | n/a |
| Warranty | Lifetime | 10 years |
| 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 ripstop nylon interior (bluesign approved), YKK zippers, Duraflex hardware | Water-resistant nylon |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Aer Day Sling 4 Max | Champs Luggage Onyx Sling Bag |
|---|---|---|---|
| AirAsia | Personal item | Fits | Too big |
| Singapore Airlines | Personal item | Fits | Too big |
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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.