KNKG CORE PRO Duffel Large 51L vs Langly Weekender Duffle Bag 50L
The KNKG CORE PRO Duffel Large 51L is 51L and 1.8kg4lb; the Langly Weekender Duffle Bag 50L is 50L and 1.8kg4lb. They weigh the same. The Langly Weekender Duffle Bag 50L costs $141 less. The KNKG CORE PRO Duffel Large 51L fits the carry-on limit of 1 of 36 major airlines and the Langly Weekender Duffle Bag 50L fits 1; under the seat, 0 and 0 of 26.
| Spec | KNKG CORE PRO Duffel Large 51L | Langly Weekender Duffle Bag 50L |
|---|---|---|
| Price | $240 | $99Best |
| Volume | 51L | 50L |
| Weight | 1.8kg4lb | 1.8kg4lb |
| Carry-on compliance | 3% | 3% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 32×50.8×32cm12.5×20×12.5in | 33×51×30.5cm13×20×12in |
| Laptop | 16" | n/a |
| Compartments | n/a | 1 |
| Bottle pockets | 2 | n/a |
| Opening | Zippered main compartment | Top-loading, full length YKK waterproof main zip opens wide |
| Warranty | 25 years | Lifetime |
| Organizer | No | Yes |
| 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 | No | No |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | 500D nylon body (PVC backing), ripstop nylon internal lining, YKK zippers, powder-coated steel hardware | Water resistant Rugged Twill cotton, lined, YKK waterproof locking zips |
| Last checked | 2026-10 | 2026-10 |
Where their airline fit differs
Both bags pass and fail the same airline size limits.
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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.