Exclusive Ankle Lok Offset Panel Traps The Laces Between The Inner And Outer Flap To Hold The Laces Tighter Longer Than Any Other Brace. Exclusive Close Spaced Eyelets Concentrate The Holding Power Where It's Needed Most Creating The Most Effective Heel Lock. Full Elastic Back Ensures Complete Unrestricted Blood Flow To The Achilles' Tendon And Virtually Eliminates The Chance For Blistering. Internal U-shaped Spiral Stays Provide Extra Support And Further Minimize The Chance For Ankle Injury. Arch Fits The Contour Of The Foot And Is Seamless So It Virtually Eliminates Irritation To The Bottom Of The Foot. Triple Layer Vinyl Laminate Provides Durability And Comfort. Exclusive Padded Tongue Option Makes It Easier To Slip Brace On And Off. Easier Application And Comfort For Fresh Sprains. Optional Side Stabilizer Inserts Provide Additional Medial And Lateral Support For Injured Ankles. Men 8-10.5 Women 10-11.5