Port Authority - Wheeled Backpack.

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 primarily for use by children 12 and under.