O'Neill Wetsuits UV Sun Protection Mens Thermo-X Long Sleeve Crew Sun Shirt Rash Guard Collar: 90% polyolefin, 10% spandex; All other panels: 56% polyester, 35% nylon, 9% spandex 220g Nylon/Spandex with DWR coating, Long Sleeve Crew 50+ UV Protection Factor Performance Fit - Skin tight Strategic Seamless Paddle Zones Boardshort Connector