The sock’s premium combed cotton & deep heel pocket cradle your feet while its mesh vents help them breathe. FEATURES Ultra Lite Cushion Arch Support Seamless Toe Closure PRODUCT CARE 64% COMBED COTTON,17% NYLON,16% POLYESTER,3% ELASTANE 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.