Fabric - 40% cotton, 40% nylon, 16% polyester, 4% elastane, Recommended - Machine Wash in 40 °C / 104 °F. Avoid Bleaching or Ironing the socks. Socks will last longer if you keep them out of the dryer., Arch support, Infiknit™ technology never rips, never tears. Made for good.Condition - New A new array of mood-boosting hues and comfort-blasted styles just dropped. Slip on a new pair for total smile saturation.