Aer Fit Pack 3 vs. STM Dux Backpack
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| Aer Fit Pack 3 | Feature | STM Dux Backpack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| Y | Passport | Y |
| Y | Passthrough | |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | Y |
| Inside | ||
| 16in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| optional | Rain-fly | N |
| 1 | Water Bottle Holder | 2 |
| Y | Water Resistant | Y |
| Material | |
| 1680D Cordura® ballistic nylon exterior | 500D x 750D Polyester |
STM Dux Backpack
| Capacity | 30 L |
| Weight | 1.78 kg |
| Dimensions | 50.8×33×24.1 cm |
| Airline fit | 39% |
| Price | $250 |
Key differences between the Aer Fit Pack 3 and STM Dux Backpack
- Laptop sleeve: 16in on the Aer Fit Pack 3; 15in on the STM Dux Backpack.
- Rain cover: Optional on the Aer Fit Pack 3; No on the STM Dux Backpack.
- Water bottle pockets: 1 on the Aer Fit Pack 3; 2 on the STM Dux Backpack.
Both have: passport pocket, backpack straps, sternum strap, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 73 accept both. 106 accept only the Aer Fit Pack 3, and 0 accept only the STM Dux Backpack.
Only the Aer Fit Pack 3 fits
Aer Lingus, Air Asia, Air Baltic, Air Canada, Air China, Air Macau, Air Malta, Air Serbia, Air Seychelles, Air Tahiti, Air Wisconsin, AirAsiaX, Alaska Airlines, Allegiant Air, American Airlines, American Eagle, Asiana Airlines, ATA Airlines, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Belavia, Biman Bangladesh, Blue Air, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, CommutAir, Delta Airlines, Dragonair, easyJet, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Flair Air, flybe, Garuda Indonesia, Gulf Air, Hawaiian Airlines, Hong Kong Airlines, Icelandair, InselAir, jetBlue Airways, Jetstar Airways, Jetstar Asia, Juneyao Airlines, Kulula, Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Malaysia Airlines, Mango, Meridiana Fly, Mesa Airlines, Nordwind Airlines, Norwegian, Oman Air, Pakistan International, Porter Airlines, Qantas Airways, Qatar Airways, Ravn Alaska, Regional Express, Republic Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, TUI, Turkish Airlines, Ukraine International, United Airlines, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Virgin Australia, Volotea, WestJet, Xiamen.
Aer Fit Pack 3 vs. STM Dux Backpack: which should you pack?
The STM Dux Backpack carries 11.3L more than the Aer Fit Pack 3 (18.7L vs. 30L), and the two are closely matched on weight. For carry-on flexibility, the Aer Fit Pack 3 fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the STM Dux Backpack; if you want to travel lighter, the STM Dux Backpack is the better call.