The open Toe and heel design gives comfort fit, better sizing and easy wearing. Material:100% Neoprene One Size(S-XL):7.5"-11”inches,19.05cm-27.94cm Highly Elastic Neoprene provides best compression with high comfort Its overall grip allows minimal heat loss and provides quick pain relief It is designed with BOOSTEC system for a perfect solution for weak or injured ankle. It helps in compressing muscle ligaments, reduce swelling & stiffness, and prevents from sprains and ankle instability.