Fabric - 63% nylon, 34% polyester, 3% elastane (may vary with color), 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., Left/Right Engineered Arch Support, Infiknit™ technology never rips, never tears. Made for good.Condition - New A golf performance sock with style unlike anything else, Lazaro is a great golf soc for the 18 hole tour.