Samsonite Tectonic Tectonic 21" Wheeled Backpack Black Ripstop - Extra strength fibers are interwoven into fabric at specific intervals to provide exceptional tear strength in a light weight material. Inline skate wheels - Are constructed of polyurethane with ball bearings to minimize frictional resistance, offer durability and reduced resistance for smooth rolling. Retractable handle - Provides easy maneuverability when extended out from the case, and stores neatly inside when not in use. Locks in place in both the fully extended and stored positions for secure traveling. Laptop compartment - Is a built-in padded compartment designed to carry your laptop computer and help protect it from shocks while traveling. Free Shipping on All Orders from Samsonite.