Terramar Thermolator Climasense 4-Way Stretch Watch Cap 86% Polyester/14% Spandex Imported Climasense thermoregulation technology keeps you comfortable in all conditions +: fast wicking and drying Midweight warmth (2.0) makes thermolator extremely versatile One size/Unisex: stretchable, can fit any head, while providing the ultimate comfort Wear our beanie on its own or under your helmet Ideal for outdoor riding, hunting ,hiking, skiing, snowboarding, Snowshoeing, cycling and other outdoor activities