RDX MMA Compression Base Layer Rash Guard Thermal Sauna Suit Shirt Top Sweatshirts Super-flexible embedded Neoprene wicks sweat away from the skin Patent Pending Rash guard Tightly fits to skin protecting the entire upper torso, arms and abdomen till the neck Exclusive flat seam technology improves strength and ensures full range of motion Promotes heat retention to help to improve blood circulation Stitched to perfection, fabric retains memory and never loses elastic form