Junior's Superman Cape Knee High Socks - One Size (Blue) Go to amazon.com Related posts How to buy the best superman cape socks? FeatureAcrylic80% Acrylic, 17% Polyester, 3% SpandexOfficially Licensed sesame street hatMachine washable DescriptionThese socks come with superhero powers all the way down to your toes! Choose from Superman, Wonder Woman, or Batman socks with little mini capes!