That's A Wrap Unisex Performance Hi-Tech Cordlock Sock, Black CLS-MA01 Mynx Blend That's A Wrap unisex performance cordlock sock Designed to fit ANY sized head and stay on at ANY speed with this highly adjustable cord locking system Offers UPF of 50+ Amazing hi-tech fabric that prohibits the growth of odor causing bacteria Performance fabrics provide natural wicking through its perforated weave to help with wicking to keep you cool