RIVERINE Women's Full Body Shaper Neoprene Bodysuit Hot Sweat Gym Yoga Jumpsuit 80% Neoprene + 20% Nylon. Neoprene material keeps your body warm and heat up your core abdominal area making you sweat more while performing your daily activities. Comfortable, lightweight, stretchy fabric molds and moves with your body while performing any activity. Provides instant abdominal compression and lumbar support, designed to maximize the effectiveness of your workout and fat burn,expedite calorie burning. Size tip: Use the Size Chart provided in photo on the left to determine your size. Measure your waist and chest in inches and choose the corresponding size in the chart.