NIID VIA Gym Bag Medium 18L vs Tom Bihn Night Flight Travel Duffel
The NIID VIA Gym Bag Medium 18L is 18L and 0.49kg1.1lb; the Tom Bihn Night Flight Travel Duffel is 16L and 0.62kg1.4lb. The NIID VIA Gym Bag Medium 18L is 0.13kg0.3lb lighter. The NIID VIA Gym Bag Medium 18L costs $178.01 less. The NIID VIA Gym Bag Medium 18L fits the carry-on limit of 36 of 36 major airlines and the Tom Bihn Night Flight Travel Duffel fits 31; under the seat, 7 and 0 of 26.
| Spec | NIID VIA Gym Bag Medium 18L | Tom Bihn Night Flight Travel Duffel |
|---|---|---|
| Price | $96.99Best | $275 |
| Volume | 18L | 16L |
| Weight | 0.49kg1.1lbBest | 0.62kg1.4lb |
| Carry-on compliance | 100%Best | 86% |
| Personal-item compliance | 27%Best | 0% |
| Dimensions | 32×44×13cm12.5×17.5×5in | 22.8×43.2×25.5cm9×17×10in |
| Laptop | n/a | no laptop sleeve |
| Opening | n/a | Zippered main compartment |
| Warranty | 1 year | Lifetime |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| 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 | Yes |
| Camera compartment | No | No |
| Material | Polyester Fabric | bluesign certified High-Tenacity 2x2 ballistic nylon exterior, 200d Halcyon nylon ripstop interior, YKK water-repellent zippers |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | NIID VIA Gym Bag Medium 18L | Tom Bihn Night Flight Travel Duffel |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air India | Carry-on | Fits | Too big |
| Allegiant Air | Personal item | Fits | Too big |
| American Airlines | Personal item | Fits | Too big |
| British Airways | Personal item | Fits | Too big |
| easyJet | Personal item | Fits | Too big |
| Emirates | Carry-on | Fits | Too big |
| Frontier Airlines | Personal item | Fits | Too big |
| LATAM Airlines | Personal item | Fits | Too big |
| Ryanair | Carry-on | Fits | Too big |
| Volaris | Personal item | Fits | Too big |
| Vueling | 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.