Jansport Double Break vs. STM Trilogy
Two carry-on travel backpacks, compared spec for spec.
Jansport Double Break
| Capacity | 27 L |
| Weight | 0.4 kg |
| Dimensions | 42×31×14 cm |
| Airline fit | 95% |
| Price | $45 |
Feature by feature
| Jansport Double Break | Feature | STM Trilogy |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 4 | Opening | 4 |
| N | Passport | N |
| 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 |
| 1 | Water Bottle Holder | 2 |
| Y | Water Resistant | Y |
| Material | |
| 400D Nylon Packcloth | 100% polyester |
Key differences between the Jansport Double Break and STM Trilogy
- Water bottle pockets: 1 on the Jansport Double Break; 2 on the STM Trilogy.
Both have: backpack straps, laptop sleeve, built-in organizer, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 177 accept both. 2 accept only the Jansport Double Break, and 1 accept only the STM Trilogy.
Only the Jansport Double Break fits
Air Tahiti, Gulf Air.
Only the STM Trilogy fits
Air Niugini.
Jansport Double Break vs. STM Trilogy: which should you pack?
The Jansport Double Break carries 3L more than the STM Trilogy (27L vs. 24L), while the Jansport Double Break is the lighter pack at 0.4kg (vs. 0.64kg). For carry-on flexibility, the Jansport Double Break fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Jansport Double Break; if you want to travel lighter, the Jansport Double Break is the better call.