Gold Toe Women's Max Outlast Short Crew Athletic Sock 100% Spandex 59% Outlast Acrylic/20% Stretch Nylon/15% Courtald Acrylic/5 % Polyester/1% Spandex Outlast for temperature control Clincher foot and high splice for arch support and achilles' tendon support Crew length, One size fits all, Shoe size 6 - 9 Machine wash warm, tumble dry low