Material 1: 100% polyester 2 Material: 96% polyester, 4% spandexFunctional underwear shirt in short sleeve model from Swede Mount. A light but warm material with efficient moisture transport and high breathability. Perfect for activity and exercise! Amazingly stretchy fabric that provide both comfort and maximum freedom of movement. Flat seams to prevent chafing and discomfort. Perfect for ski holidays and all the winter activities!