Aetrex Copper Sole Unisex Athletic Socks Crew Added cushioning from heel to toe for superior shock absorption Elasticized arch support for added protection that reduces friction to help prevent blistering Technologically advanced Moisture-Guard wicking system Eliminates 99.9% of the bacteria and fungi in the socks to control odor and rejuvenate the skin Machine wash warm with like colors. Use only non-chlorine bleach when needed. Tumble dry medium