RAD Heavy Duty Sauna Suits Worn in the Gym or during Exercise to provide warmth and help produce sweat. These RAD Sauna Suit Are primarily designed to burn your calories at a high rate and help you lose weight by increasing the amount of perspiration through the skin. The RAD Sauna Suits are made from an insulating fabric that can trap heat close to the body. This means you'll feel just as warm sitting in the room wearing one as you would without one. In addition to helping you stay warm, it also helps keep outside air from cooling down your body temperature too quickly. This prevents you from being able to sweat effectively.