Aibag Waterproof Packable Sling Chest Sport Shoulder Bag Backpack Highest constraction waterproof nylon material Side pockets and Padded and adjustable shoulder straps High quality foldable Cross Body Bag, Can be folded into a pouch and expanded to a large backpack. Height x Length x Width: 41 x 30 x 11cm / 16.1 x 11.8 x 4.3 inch Unique design straps ease the pressure on the shoulder, and The cushion with high permeability material, have never cover the sweat when you carry it a long time