With two ways to carry this handy pack, your bag is always at hand. Take the strain off by rolling this wheeled pack, or use the straps and carry like a backpack. 600 denier polyester with ripstop accents and rubber bottom Two large front pockets, side pockets and mesh water bottle holder One-hand push button pulley system for easy use and stowage; handle extends to 18.5' Smooth, durable inline skate wheels Dimensions: 20.5'h x 13'w x 7.9'd; Approx. 2,097 cubic inches Backpacks not intended for use by children 12 and under.