4Fit Neoprene Sweat Shirt Rash Guard Sauna Suit Weight Loss Top MMA (S to 6XL) Made of 3mm extreme Flex DS Neoprene and holds a pleasant warmth. Heated by body heat offers serious sweat loss of excess pounds It zips up the front and it may be worn or taken off easily.It is hand washable. Fits close to the body for uninhibited movement during training Union Machine seams & an anatomical cut give total freedom of movement.Ideal for all sparring, grappling, rolling and MMA workouts.