KNKG CORE PRO Duffel Large 51L vs Maxpedition Doppelduffel Adventure Bag 57L
The KNKG CORE PRO Duffel Large 51L is 51L and 1.8kg4lb; the Maxpedition Doppelduffel Adventure Bag 57L is 57L and 1.81kg4lb. The KNKG CORE PRO Duffel Large 51L is 0.01kg0lb lighter. The KNKG CORE PRO Duffel Large 51L costs $80.99000000000001 less. The KNKG CORE PRO Duffel Large 51L fits the carry-on limit of 1 of 36 major airlines and the Maxpedition Doppelduffel Adventure Bag 57L fits 0; under the seat, 0 and 0 of 26.
| Spec | KNKG CORE PRO Duffel Large 51L | Maxpedition Doppelduffel Adventure Bag 57L |
|---|---|---|
| Price | $240Best | $320.99 |
| Volume | 51L | 57L |
| Weight | 1.8kg4lbBest | 1.81kg4lb |
| Carry-on compliance | 3%Best | 0% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 32×50.8×32cm12.5×20×12.5in | 64.8×35.6×27.9cm25.5×14×11in |
| Laptop | 16" | no laptop sleeve |
| Bottle pockets | 2 | n/a |
| Compression straps | n/a | 5 |
| Opening | Zippered main compartment | Clamshell, Full clamshell |
| Warranty | 25 years | Lifetime |
| Organizer | No | Yes |
| Shoe compartment | Yes | No |
| Hydration sleeve | No | Yes |
| Frame sheet | No | No |
| Water-resistant | No | Yes |
| Rain cover | No | No |
| MOLLE | No | Yes |
| Hip belt | No | No |
| Sternum strap | No | Removable |
| Load lifters | No | No |
| Shoulder strap | Yes | Removable |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Material | 500D nylon body (PVC backing), ripstop nylon internal lining, YKK zippers, powder-coated steel hardware | 1000D ballistic nylon, triple polyurethane coated, Teflon fabric protector |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | KNKG CORE PRO Duffel Large 51L | Maxpedition Doppelduffel Adventure Bag 57L |
|---|---|---|---|
| Singapore Airlines | 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.