Rapala Sportsmans Frost is a light and durable winter boot that keeps the heat down to an incredible -40 degrees. The boot is made of the lightweight material EVA and is completely waterproof. The warming felt sock and sole can be easily removed and therefore dries quickly and easily. The long shaft ends with a lace lock so that you do not get snow in the boots. Whether you are fishing, hunting or staying outdoors during the coldest months of the year, Sportsmans Frost warms your feet.