Samsonite Cruisair DLX Hardside HS 30" Spinner Bayer Makrolon Polycarbonate - Amorphous thermoplastic material noted for its outstanding impact strength, superior stability, excellent thermal resistance, and low-temperature toughness. 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. Cross straps - Secure the contents of your luggage to help prevent shifting that can cause damage. They also help keep the contents of your luggage organized. TSA Lock - provides luggage additional peace of mind when checking belongings, but can still be easily accessed by TSA agents in the event the case needs to be searched.