Features & Benefits Anatomically Designed Semi-rigid Shells Lined With The Patented Duplex(tm) Aircell Technology For Support And Graduated Compression During Ambulation The Compression Promotes Efficient Edema Reduction In Addition To Helping Accelerate Rehabilitation From Ankle Sprains Anatomically Designed For Acute Ankle Injury Post-operative Use Chronic Instability And Ankle Sprains Grade I Ii And Iii Pdac Assigned Code: L4350