Paradox Ladies 1/4 Zip Base Layer Top - Blue Odor Eliminating Technology, Merino Blend, Non-Itchy, Quick Dry, Stretch Fabric, UV Protection 84% Polyester 11% Merino Wool 5% Spandex It dries 4X faster than cotton. The blend is soft on skin, non-irritating, and wont shrink or lose its original shape