Material: Inner Layer:100% Neoprene; Outer Layer: 100% PolyesterDesigned to maximize the fat-loss and muscle toning results that you're aiming for when working out in this Neoprene Double Belted Sweat Vest at the gym. You'll reach your fitness goals faster and easier than expected, with consistency.It Features:1. Front zipper design for a firm fit, facilitating wear on and off;2. Adjustable Velcro closure for different levels of compression;3. Double waist belts add targeted compression to the midsection area;4. Internal neoprene increases thermal activity and stimulates sweating from your gym sessions;5. The waist trainer vest provides tummy control, back support, and waist trim.