STM Prime vs. Gossamer Gear Loris 25 Daypack
Two carry-on travel backpacks, compared spec for spec.
STM Prime
| Capacity | 15 L |
| Weight | 0.7 kg |
| Dimensions | 42×26×13 cm |
| Airline fit | 96% |
| Price | $80 |
Feature by feature
| STM Prime | Feature | Gossamer Gear Loris 25 Daypack |
|---|---|---|
| Storage | ||
| N | Compression | 4 |
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| top | Passport | top |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | removable |
| Y | Sternum Strap | Y |
| Inside | ||
| 13in | Laptop | N |
| 2 | Main Compartments | 2 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |
| Material | |
| Polyester | 70D Recycled Robic Nylon PFAS-free |
Gossamer Gear Loris 25 Daypack
| Capacity | 25 L |
| Weight | 0.6 kg |
| Dimensions | 46×28×17 cm |
| Airline fit | 95% |
| Price | $135 |
Key differences between the STM Prime and Gossamer Gear Loris 25 Daypack
- Compression straps: No on the STM Prime; 4 on the Gossamer Gear Loris 25 Daypack.
- Hip belt: No on the STM Prime; Removable on the Gossamer Gear Loris 25 Daypack.
- Laptop sleeve: 13in on the STM Prime; No on the Gossamer Gear Loris 25 Daypack.
Both have: passport pocket, backpack straps, sternum strap, 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. 179 accept both. 2 accept only the STM Prime, and 0 accept only the Gossamer Gear Loris 25 Daypack.
Only the STM Prime fits
Air Tahiti, Gulf Air.
STM Prime vs. Gossamer Gear Loris 25 Daypack: which should you pack?
The Gossamer Gear Loris 25 Daypack carries 10L more than the STM Prime (15L vs. 25L), while the Gossamer Gear Loris 25 Daypack is the lighter pack at 0.6kg (vs. 0.7kg). For carry-on flexibility, the STM Prime fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Gossamer Gear Loris 25 Daypack; if you want to travel lighter, the Gossamer Gear Loris 25 Daypack is the better call.