Spinner Wheels - Four wheels...zero effort, four multidirectional spinner wheels allow 360 degree upright rolling in multiple directions so there is no weight on your arm. 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. Compression Straps - For extra security, reinforcement and ease in adjusting size of bag.