Gregory Signal 20 vs Thule Lithos 20L
The Gregory Signal 20 is 20L and 0.71kg1.6lb; the Thule Lithos 20L is 20L and 0.73kg1.6lb. The Gregory Signal 20 is 0.02kg0lb lighter. The Gregory Signal 20 fits the carry-on limit of 35 of 36 major airlines and the Thule Lithos 20L fits 32; under the seat, 0 and 0 of 26.
| Spec | Gregory Signal 20 | Thule Lithos 20L |
|---|---|---|
| Price | n/a | $99.95 |
| Volume | 20L | 20L |
| Weight | 0.71kg1.6lbBest | 0.73kg1.6lb |
| Carry-on compliance | 97%Best | 89% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 52×28×19cm20.5×11×7.5in | 43.9×27.9×21.1cm17.5×11×8.5in |
| Laptop | 13" | 16"Best |
| Bottle pockets | 2 | 2 |
| Compression straps | 2 | n/a |
| Opening | large zippered main compartment | n/a |
| Warranty | 50 years | Lifetime |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | Yes | No |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 100% recycled 300D polyester ripstop with PFAS-free C0 DWR, 135D recycled polyester lining | Polyester Ripstop |
| Last checked | 2026-10 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Gregory Signal 20 | Thule Lithos 20L |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air India | Carry-on | Fits | Too big |
| Qatar Airways | Carry-on | Too big | Fits |
| Ryanair | Carry-on | Fits | Too big |
| Vueling | Carry-on | Fits | Too big |
Add more bags to this comparison
Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.