By staying dry as possible, you stay cool in hot weather and warm in cool weather. WikMax Long Sleeve includes a hyper wicking and fast drying base layer. It's comfortable, versatile, and extremely durable. * This is the best and most comfortable in Moisture Management Apparel * Made with WikMax dual layer technology * Feels like cotton but will amaze you how quickly you dry when you sweat * For use in temperatures of 40-100 degrees * 50% Polyester / 50% Polyolefin * Unisex design