Quality materials to provide warmth and prevent dampness. The upper layer of hair which is genuine dark sheep's wool is dense and soft, providing comfort and warmth. The bottom layer of polyethilene and cork help keep out humidity and cold. This layer also has an anti slip coating to keep the insole in place inside your boots or shoes. Made in Spain. NOTE: This item is nonrefundable for sanitary reasons. Article No: 23080 LIMITED QUANTITIES!