Copper Sole Men's Pro Therapy Cupron Ankle Socks 47% Copper, 40% Polyester, 12% Nylon, 1% Spandex Made in US Machine Wash Cupron AntiFungal fibers kill and prevent Athlete's Foot Fungus on the sock Cupron AntiFungal fibers help kill foot odor and help improve foot appearance Moisture-dispersion technology keeps feet dry and comfortable Cushioning in the sole of the sock absorbs shock, protects feet, and provides durability Non-binding top and smooth toe seam