Merino wool and lightweight acrylic blend provide moisture wicking comfort. Constructed with antimicrobial material which fights odor-forming bacteria. Durability through reinforced nylon on toe, heel and upper. Full cushion sole reduces impact. Flat toe seam prevents irritation. Merino Wool 52%, Acrylic 14%, Stretch Nylon 12%, Nylon 12%, LYCRA 5%, Modal 5%.