Castelli free kit 13 sockstand out in a crowd with castellis free kit 13 socks these crew length socks are made of meryl skinlife bacteriostatic yarns and the medium compression construction gives you a secure feeling whilst wearing them they feature arch support bands striped design and the castelli wordmark across the top of the feet featuresmeryl skinlife bacteriostatic yarnsmedium compression construction gives secure feelingarch support bandbanded castelli wordmark across top of foot