Product InformationAn awesomely warm beanie, the Link hat from Seirus is not only stylish, its also bolstered by the heat-return technology of Heatwave. The revolutionary dual heating system found in the Seirus exclusive Heatwave lining reflects and amplifies your bodys heat to produce that warm cozy feeling we all look for in a winter hat. So you never have to sacrifice style for warmth. Heatwave Link Beanie - Heather Navy