1. Material: Inner Layer:100%Neoprene;Outer Layer:100%Polyester; 2. Front zipper design for a firm fit, facilitating wear on and off; 3. Adjustable Velcro closure for different levels of compression; 4. Double waist belts add targeted compression to the midsection area; 5. Internal neoprene increases thermal activity and stimulates sweating from your gym sessions; 6. The waist trainer vest provides tummy control, back support, and waist trim.