Large Black Nylon Lightweight Packable Folding Foldable Travel Backpack Shoulder Bag Material: 70D Nylon extremely lightweight and easy to fold; available in Black color Quickly converts from shoulder bag to backpack in seconds with 1 zipper; 3" long zipper pulls for easy quick access Awesome storage: Shoulder bag mode has 2 large zippered pockets. Backpack mode has 3 large zippered pockets, 1 large 15"L x 12"W x 4"D main compartment with 9"L x 12"W velcro closing open pocket, 1 side mesh bottle holder pocket, 1 side velcro flap pocket for cell phone (6"L x 2.5"W x .5"D), pens, etc... Backpack has adjustable shoulder straps for great fit, and shoulder tote bag includes an adjustable strap Total Dimensions: 15"L x 12"W x 4.37"D