Expansion and contraction to fit your load. Expandable gusset is very thoughtfully designed; it works without you having to think about it.
Surprising amount of space for how small this thing can look on the body. Mirrorless cameras with small/pancake lenses will likely fit, for example.
Modern tech organization panels and compartments make duffels like theseactually nice to travel with.
Lots of capacity. Suitcase opening. Mesh organization on top panel. (All like you expect them to be)
Totally customizable and removable inner organization. Can all be removed and makes a great daily carry bag (or leave some in and customize for how you carry).
The Duffelpack from Peak Design expands from 45L to 65L (a little too large for carry-on on most airlines), has backpack straps that hide away, is made of weatherproof material and is a durable and organized companion for LOTS of different kinds of adventures. view bag
The Truck from Tom Bihn is an excellent 25L organized tote with extra comfortable handles and rugged, durable materials. This is our favorite "family adventure tote" at the moment because it's just an excellent bag for beaches, parks and grocery stores. view bag