polyester Buckle closure This drawstring backpack is made of water-resistant nylon with lined interior. Matching with a front flap to protect from rain. Not easy to tear. Large room to store your items , 1 x main compartment, 1 x zipped front pocket, 2 side pocket, 2 inside pockets and 1 inside pocket with zipper, 1 bottle holder pouch. The adjustable straps are comfortable and durable, No feeling any uncomfortable when you wear it. Dimension: 11.5 x 16.5 x 6(L x H x W). Ideal size for carrying a variety of items such as clothing, sporting gear, daily supplies, etc. This Sport Sackpack is perfect for men and women who like travel, hiking, swimming, yoga. For boys and girls, it can be as a school bookbag. It is a great sports gift for everyone.