This backpack is always ready to go. A clever mesh water bottle holder conveniently stuffs away in a zippered pocket when not in use. 600 denier polyester, 1,680 denier ballistic polyester contrast Top web handle Lightly padded back and straps Two large compartments Four interior pockets Dimensions: 18'h x 12.5w'x 8d; Approx. 1,800 cubic inches Bags not intended for use by children 12 and under.