The Pro-Tec Ankle Brace is a lace-up brace designed to stabilize the ankle joint. It helps prevent sprains, inversions and common ankle injuries. Design Features: Lightweight "lace-up", low-profile design is comfortable within shoe, spring steel stays add stability, foam filled, breathable mesh fabric "fits like a glove" Sizing Guide: Item# 2200 Small Men 6-7 Women 5-7.5 Item# 2201 Medium Men 7.5-10 Women 8-10.5 Item# 2202 Large Men 10.5-12.5 Women 11-13 Based on shoe size. Larger ankles buy one size up.