Sidi Hyper Extension System

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The Sidi Hyper Extension Block System is designed for use with Crossair and Atojo SRS boots. This innovative system helps prevent hyperextension of the ankle and foot, providing cr itical protection during demanding off-road and motocross rides. Replace worn or damaged parts easily to maintain the protective integrity of your boots. Designed for Sidi Atojo SRS and Crossair models Prevents hyperextension-related injuries Maintains flexibility while improving foot and ankle protection Includes necessary screws for quick installation Show more