Hyperflex Wetsuits Men's Polyolefin L/S Hooded Rash Guard Polyolefin Imported COMFORT: Offers a perfect combination of Polyolefin on the shoulders for warmth and neoprene on the chest for lightweight comfort. MULTI-SPORT: Designed for hanging on the beach or water sports including surfing, paddleboarding, windsurfing, water skiing, wakeboarding, etc. WARMTH: Constructed with polyolefin which has the highest insulating capacity of any fiber for max warmth. MULTIPLE USES: Wear as a standalone, with boardshorts, or as an added layer under a wetsuit. FLEXIBLE: A close fit style that won't inhibit freedom of movement.