RDX Sauna Suit Neoprene MMA Compression Base Layer Rash Guard Thermal Shirt Top Sweatshirts RDX Ultra Flex 1.9mm DS neoprene Sweat Shirt Protect your hide from rashes & plenty of warmth for serious sweat loss Fits close to the body for uninhibited movement during training Flat-lock seams & an anatomical cut give total freedom of movement Ideal for all sparring, grappling, rolling and MMA workouts