PRANA Men's Waymann 2mm Jacket 55% Polyester, 40% Neoprene Rubber, 5% Spandex Imported Performance Spring long sleeve Jacket Made for warm water: 65 Degree+ F/18 Degree+ C 2mm hyperstretch neoprene with recycled polyester/spandex interior and exterior for comfort It is made up of Recycled Polyester