Double sock construction absorbs friction, whilst the Meryl skinlife inner sock wicks moisture to the outer cotton sock, keeping the skin dry. Inner sock is Meryl skinlife with permanent anti microbial qualities. Outer sock contains lycra for a better fit. Arch grip section and W heel for optimumfit. Soft touch reinforced heel and toe. Pre shrunk and new improved fit. New Ventflex panel on the front of the ankle for improved ventilation and flexiility. New heel and toe box shape for extra abrasion resistance. Flat seamless toe construction to help prevent blisters. 42% Meryl skinlife, 26% Nylon, 30% Cotton and 2% Lycra.