Our warmest women's beanie. The Lapland Heat Boost lined beanie offers hunters ultimate in warmth to withstand the cold of late season hunts. Heat Boost is a pioneer in the next generation of fabrics with new functionalities. Knitting graphene yarn into our sherpa fabric super charges it with graphene's thermal conductive properties, making a warm material even warmer - 30% warmer. This performance fleece hat is fully lined with Heat Boost graphene sherpa. The sides are curved to ensure your ears are covered. A DWR treatment on the exterior makes light moisture bead up and roll off the fabric. Pull on for all day lasting warmth.1 Year Limited Warranty