The ortlieb duffle bag is a waterproof adventure bag with all essential features to cope with some of the toughest elements out there the duffle is for adventurers searching the extreme and expecting excellent performance the waterproof travel bag protects clothing etc from water and dirt and can quickly be converted into a backpack by using the padded handles as shoulder straps a long tizip zip allows quick access to your gear internal straps compress the volume the tough ps620c base fab