The Travel Duffelpack 65L from Peak Design is a duffel-style bag with an ID card holder that has a top made from 100% recycled 600D nylon canvas and a 900D ottoman-weave polyester fabric bottom. The long oversized #10 weatherproof zipper allows the bag to be opened wide, so you have ample room and easy access to equipment. The bag is designed to hold four optional packing cubes and there are two internal and external pockets for accessories.