The Chelsea Thermal Adult 1PP Size 6-11 Black Socks are official product and is a one size fits all set. The pack has 1pair in black makes a great gift which can be worn in training on the pitch or at home it will also keep you very warm during the winter seasons with its thermal insulation. The socks are made from a blend of 84% Acrylic 16% Polyester and features in full colour Chelsea club crest and logo. Wash & care instructions on the label. The Chelsea Thermal 1PP Black Socks are an official Chelsea product made under licence for Chelsea Football Club.