As much of your body heat escapes through your head, keeping your cranium covered is imperative when outdoors in wintry weather. Whether hunting, hiking, snowmobiling, or just doing winter chores, this Mil-Tec Olive Drab Thinsulate Watch Cap will keep your head warm in even the coldest conditions. It features Thinsulate insulation, a 3M innovation trusted for decades by militaries around the world to prevent hypothermia and frostbite in troops while not restricting freedom-of-movement. Now countless civilians choose Thinsulate for its thermal efficiency and lack of bulk. Elastic fibers allow the Mil-Tec Watch Cap to fit most heads.