85% Cotton 10% Polyester 5% Spandex Reinforced Heel & Toe Machine Wash Fits shoe size 7-12 Stretches low to mid-calf Though usually docile the Corgi Shark becomes very aggressive when in pursuit of its favourite food. Good Luck Sock offers a huge variety of awesome cool colourful crazy and fun socks to choose from for men & women. Reinforced heel & toe for better durability and just the right amount of stretch for all-day comfort.