STM Trilogy vs. Unbox Therapy X Pacsafe 25L Anti-Theft Backpack
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| STM Trilogy | Feature | Unbox Therapy X Pacsafe 25L Anti-Theft Backpack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| N | Passport | Y |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| N | Sternum Strap | N |
| Inside | ||
| 15in | Laptop | 15in |
| 1 | Main Compartments | 1 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2 | Water Bottle Holder | 2 |
| Y | Water Resistant | Y |
| Material | |
| 100% 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 Trilogy and Unbox Therapy X Pacsafe 25L Anti-Theft Backpack
- Passport pocket: No on the STM Trilogy; Yes on the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack.
Both have: backpack straps, laptop sleeve, built-in organizer, 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. 174 accept both. 4 accept only the STM Trilogy, and 0 accept only the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack.
Only the STM Trilogy fits
Air Niugini, American Eagle, easyJet, Ravn Alaska.
STM Trilogy vs. Unbox Therapy X Pacsafe 25L Anti-Theft Backpack: which should you pack?
The Unbox Therapy X Pacsafe 25L Anti-Theft Backpack carries 1L more than the STM Trilogy (24L vs. 25L), while the STM Trilogy is the lighter pack at 0.64kg (vs. 1.05kg). For carry-on flexibility, the STM Trilogy fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Unbox Therapy X Pacsafe 25L Anti-Theft Backpack; if you want to travel lighter, the STM Trilogy is the better call.