This backpack ia made of high-density waterproof nylon material, with two-way waterproof zipper, which can effectively protect the items in the collapsible rucksack from getting wet. The anti-tear performance can effectively prevent rocks, branches from scratching the plain backpack. Durable and folded down to the size of your hand, it even fits in your pocket, making it easy to carry. 17 5/16" L x 11" W x 5 1/2" H
