RAD Heavy Duty Sweat Shirt Sauna Exercise Gym Suit Fitness Weight Loss Top Men RAD Sweat Shirt is made of 1.99 mm extreme Flex DS neoprene. It is a guard to save you from rashes.It offers complete freedom to move. Suitable for all kind of activities, especially sparring,grappling and rolling. Extreme Flex grade Neoprene stretches and conforms to the the main part of the body. The greatest value-for-money.It is hand washable.