Durable bullet proof ballistic nylon backed with Vapor Barrier for long lasting use. Protected and recessed velocity in-line skate wheels. Carry-on size fits in the overhead compartment of most U.S. domestic airlines. Fully line interior with adjustable tie-down straps, zippered mesh pocket and shoe pockets. Roomy main compartment expands 2 inches, maximizing packing space. Telescoping pull handle with "one hand operation" push button to lock and release. Padded top handle provide optimum comfort. Ballistic Nylon.