Combines an inner hook-and-eye panel with a zippered layer and two overlapping elastic velcro compression straps for dual-level tummy control.Material: Made of flexible, thermal neoprene material designed to increase core temperature and promote sweating during workouts.Support: Contains internal steel or flexible boning to provide back support and assist with posture alignment while worn. only use it 6 months I don't need it anymore it did its job I so happy with my results. washed and ready to pack to go to the next person.