Aer Duffel Pack 3 vs WaterField Designs Air Porter Backpack
The Aer Duffel Pack 3 is 21.4L and 1.32kg2.9lb; the WaterField Designs Air Porter Backpack is 22L and 1.31kg2.9lb. The WaterField Designs Air Porter Backpack is 0.01kg0lb lighter. The Aer Duffel Pack 3 costs $240 less. The Aer Duffel Pack 3 fits the carry-on limit of 35 of 36 major airlines and the WaterField Designs Air Porter Backpack fits 36; under the seat, 0 and 8 of 26.
| Spec | Aer Duffel Pack 3 | WaterField Designs Air Porter Backpack |
|---|---|---|
| Price | $179Best | $419 |
| Volume | 21.4L | 22L |
| Weight | 1.32kg2.9lb | 1.31kg2.9lbBest |
| Carry-on compliance | 97% | 100%Best |
| Personal-item compliance | 0% | 31%Best |
| Dimensions | 52×30×20cm20.5×12×8in | 41.9×30.5×17.8cm16.5×12×7in |
| Laptop | 16" | 16" |
| Bottle pockets | 2 | n/a |
| Opening | Panel access, Front-load main compartment | main compartment zip, two top front pockets, external front pocket, two side pockets |
| Warranty | Lifetime | Lifetime |
| Organizer | Yes | Yes |
| Shoe compartment | Yes | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | Yes | Removable |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | 1680D CORDURA ballistic nylon exterior, antimicrobial-treated liner, YKK zippers, Duraflex hardware | 15 oz waxed canvas or EcoPac, full-grain leather accents, YKK waterproof zippers |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Aer Duffel Pack 3 | WaterField Designs Air Porter Backpack |
|---|---|---|---|
| Allegiant Air | Personal item | Too big | Fits |
| American Airlines | Personal item | Too big | Fits |
| British Airways | Personal item | Too big | Fits |
| easyJet | Personal item | Too big | Fits |
| Frontier Airlines | Personal item | Too big | Fits |
| JetBlue Airways | Personal item | Too big | Fits |
| LATAM Airlines | Personal item | Too big | Fits |
| Qatar Airways | Carry-on | Too big | Fits |
| Volaris | 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.