From bag to backpack, you can easily switch, thanks to the straps that come with our sporty duffel bag. It’s water resistant and made from a soft fabric. And for extra convenience it comes with a separate pack sack. Water resistant main fabric. External pocket with zip Internal pocket. Packable in external wash bag. Top carry straps. Removable padded shoulder straps. Carry on compatible on most airlines. 100% Polyester.