Treat your feet to climate control! E.A. Mattes lambskin insoles create the perfect climate inside your shoes, regulating both temperature and moisture and helping to neutralize odors. These natural-colored lambskin insoles from MATTES are guaranteed to fit your feet and your shoes. With a dry climate inside your shoes, bacteria and fungi (e.g. athletes foot) have little chance. Lambskin insoles are not washable.