STM Dux Backpack vs. Unbox Therapy X Pacsafe 25L Anti-Theft Backpack
Two carry-on travel backpacks, compared spec for spec.
STM Dux Backpack
| Capacity | 30 L |
| Weight | 1.78 kg |
| Dimensions | 50.8×33×24.1 cm |
| Airline fit | 39% |
| Price | $250 |
Feature by feature
| STM Dux Backpack | Feature | Unbox Therapy X Pacsafe 25L Anti-Theft Backpack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| Y | Passport | Y |
| Passthrough | N | |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| Y | Sternum Strap | N |
| Inside | ||
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| N | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2 | Water Bottle Holder | 2 |
| Y | Water Resistant | Y |
| Material | |
| 500D x 750D Polyester | 1000D Polina with wax coating, 150D Recycled polyester |
Unbox Therapy X Pacsafe 25L Anti-Theft Backpack
| Capacity | 25 L |
| Weight | 1.05 kg |
| Dimensions | 47×32×16 cm |
| Airline fit | 92% |
| Price | $180 |
Key differences between the STM Dux Backpack and Unbox Therapy X Pacsafe 25L Anti-Theft Backpack
- Sternum strap: Yes on the STM Dux Backpack; No on the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack.
- Built-in organizer: No on the STM Dux Backpack; Yes on the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack.
Both have: passport pocket, backpack straps, laptop sleeve, water bottle pockets, 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. 0 accept only the STM Dux Backpack, and 101 accept only the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack.
Only the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack fits
Aer Lingus, Air Asia, Air Baltic, Air Canada, Air China, Air Macau, Air Malta, Air Serbia, Air Seychelles, Air Wisconsin, AirAsiaX, Alaska Airlines, Allegiant Air, American Airlines, 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, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Flair Air, flybe, Garuda Indonesia, 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, 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.
STM Dux Backpack vs. Unbox Therapy X Pacsafe 25L Anti-Theft Backpack: which should you pack?
The STM Dux Backpack carries 5L more than the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack (30L vs. 25L), while the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack is the lighter pack at 1.05kg (vs. 1.78kg). For carry-on flexibility, the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack fits 92% 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 Unbox Therapy X Pacsafe 25L Anti-Theft Backpack is the better call.