Material 1: 100% polyester 2 Material: 96% polyester, 4% spandexFunctional underwear pants from Swede Mount. Light but warm material with efficient moisture transport and high breathability. Perfect for activity and exercise! Stretchy fabric and a more elastic waist to provide both comfort and maximum freedom of movement. Flat seams to prevent chafing and discomfort. Perfect for ski holidays and all the winter activities!