Lo & Sons Catalina Deluxe Small vs Topo Designs Mountain Duffel 40L
The Lo & Sons Catalina Deluxe Small is 40L and 1.09kg2.4lb; the Topo Designs Mountain Duffel 40L is 40L and 1.13kg2.5lb. The Lo & Sons Catalina Deluxe Small is 0.04kg0.1lb lighter. The Topo Designs Mountain Duffel 40L costs $9 less. The Lo & Sons Catalina Deluxe Small fits the carry-on limit of 5 of 36 major airlines and the Topo Designs Mountain Duffel 40L fits 1; under the seat, 0 and 0 of 26.
| Spec | Lo & Sons Catalina Deluxe Small | Topo Designs Mountain Duffel 40L |
|---|---|---|
| Price | $178 | $169Best |
| Volume | 40L | 40L |
| Weight | 1.09kg2.4lbBest | 1.13kg2.5lb |
| Carry-on compliance | 14%Best | 3% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 40.6×45.7×21.6cm16×18×8.5in | 26×50.8×30.5cm10×20×12in |
| Laptop | no laptop sleeve | no laptop sleeve |
| Warranty | 1 year | Lifetime |
| Organizer | Yes | No |
| Shoe compartment | Yes | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | No |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | Yes | Removable |
| Luggage pass-through | Yes | No |
| Camera compartment | No | No |
| Material | Eco-friendly canvas or 600D recycled polyester | 200D recycled nylon lightweight ripstop, 400D recycled nylon, 1680D recycled ballistic nylon, matte non-P PVC liner, PFC-free DWR |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Lo & Sons Catalina Deluxe Small | Topo Designs Mountain Duffel 40L |
|---|---|---|---|
| British Airways | Carry-on | Fits | Too big |
| easyJet | Carry-on | Fits | Too big |
| Frontier Airlines | Carry-on | Fits | Too big |
| Southwest Airlines | Carry-on | Fits | Too big |
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Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.