The Sidi Mag-1 Tecno 3 Magnetic Short is a premium tensioner replacement system designed for Mag-1, Mag-1 Air, and Speedride boots. Utilizing a magnetic mechanism, it offers precise adjustments, ensuring a secure and personalized fit for every ride. This high-quality replacement part helps maintain the integrity and performance of your boots, allowing for quick and easy replacements when needed. Sidi Mag-1 Tecno 3 Magnetic Short