Endorsed by the American Chiropractic Association. Microfiber is lightweight, solid-colored polyester. the exterior features two zip pockets (one front and one back) and two side slip pockets. The front u-shaped zip compartment features four slip pockets, three pen slip pockets, and an id window. The main compartment features two mesh slip pockets. Laptop compartment accomadates up to a 15" laptop. Padded shoulder straps are shaped for optimum comfort on the body. The back panel is padded and features a shaped trolley sleeve. Zip closures.