1680D Ballistic - Is a standard, even weave of durable nylon material originally specified by the Federal Government for military use. The term "denier" (D) refers to the size of the yarn used: the larger the denier, the bigger the yarn. 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 suitcase, 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.