The Osprey Packs Transporter 40 Duffle will have you dreaming up new travels before you can even put your pack together. This bag is made of waterproof, double-coated nylon. It has a main compartment featuring a large u-zip, and the bag's harness and sternum straps allow you to wear it as a backpack. Or you can tuck these away if you want to carry the duffle by hand to your next exciting destination.