Merino wool and acrylic blend provide added warmth and comfort. Constructed with anti microbial material which fights odor forming bacteria. Durability through reinforced nylon on toe, heel and upper. Full cushion sole, toe, heel and padded reinforced shin add comfort and reduces impact. Flat toe seam prevents irritation. Merino wool 50%, Acrylic 23%, Stretch nylon 11%, Nylon 7%, Lycra 5%, Modal.