The Sport-Stirrup� is designed to help prevent ankle injuries the Sport-Stirrup is based on the Air-Stirrup Ankle Brace but has a narrower design for less bulk in a sneaker or shoe * The Sport-Stirrup has anatomically designed shells that prevent inversion/eversion * Each shell is lined with the patented Duplex aircell system * This exclusive system incorporates two pre-inflated overlapping aircells distal and proximal that provide support and protection during ambulation * Features Semi-rigid anatomically designed shells prevent inversion/eversion * Patented Duplex aircell system for support and protection * Pre-Inflated aircells for easy application * For Prophylactic protection *