Merino 35%, acrylic 20%, nylon 35%, spandex 10% Merino Double Tab Sock medium weight Precision cushion boot and foot Reverse Toe Seam Full cushion ring toe Reinforced heel and toe with nylon spandex Bear clincher arch support Anti-microbial merino fresh Nano AB Guaranteed for life with proof of purchase. Care Machine Wash Warm, Wash Inside Out. SHIPS OUT WITHIN 24 HOURS OR CAN BE DROP OFF LOCALLY