This bag is different from the original travel bag. You can carry it or you can use it as a cover while wheeling. It is made of Nylon. It folds into the pocket on the side of the bag and comes with velcro loops to hang the Strida nylon bag when folded on the bike. The Strida Nylon bag has an expansion zipper so the bag will fit Stridas with both 16 and 18 inch wheels.