Valentina Womens Sweat Shaper Tank Top Hot Slimming Sauna Vest Shirt Black Material: 80% Neoprene + 20% Nylon. Keeps your body warm and heat up your core abdominal area making you sweat more while performing your daily activities. Helps in burning tummy fat, reducing your abdomen and waist. Make you sweat and leads to healthy weight loss. Comfortable, light-weight; Looks great and matches with any combination of workout clothes or can even be worn under everyday clothes. Maximizes fitness routine; Perfect for exercise, for normal daily routines, or for any physical activity. Estimated Time of Arrival by USPS: 5-15 Days.