Naturehike Foldable Daypack Ultraligh Portable Super Light Outdoor Backpack Folding Bag Camping Backpack Climbing Bag 22L 100% nylon material made, lightweight, durable and waterproof Folding design with zip and wristband, easy and convenient to store and carry High-tough Nylon shoulder straps together with buckles, easy to adjust its length as needed Thickened mesh pad and air flow system design on the back, breathable and ventilated, to make you relaxed and comfortable Aluminum made sliders and buckles design on the shoulder to adjust both its height and length as needed