Material: Shell: 100% Polyester; Lining: 100% Neoprene. 2.1mm thick neoprene bodysuit made from neoprene composite fabric offering a soft, elastic, and sweat-conducting feel with airtight properties. Double waist belts provide abdominal compression and waist support. Reinforced with four 5mm wide steel bones at the front and back for added structure. READY FOR SAUNA SWEAT: This 2-in-1 vest and waist trainer for men is constructed from neoprene and polyester synthetic materials, designed to be breathable, adjustable, and flexible for movement. Wearing this waist trainer before exercise may help increase water weight loss and retain body heat to support calorie burning. The thermal design also helps keep you warm on cold days. EASY TO PUT ON AND OFF: Features an upgraded neoprene design with a zipper closure for convenient wear and removal. Designed to contour comfortably to the body, promoting a proper fit and improved posture. A supportive compression vest for men during workouts. EFFECTIVE WAIST TRAINER VEST: This neoprene waist trainer vest for men targets the core abdominal area with full coverage. Includes an outer adjustable belt to enhance thermogenic activity and help flatten the abdomen, promoting increased sweat and more efficient workout performance. SUITABLE FOR VARIOUS ACTIVITIES: This compression vest helps flatten the stomach, support posture, and promote sweating during physical activity. Ideal for use during running, gym workouts, basketball, and sauna sessions. A versatile and effective fitness accessory for men of all body types.