The Sidi Asymmetric Heel Cup is engineered to deliver extra heel protection for Sidi Rex, Rex Air, Mag-1, and Mag-1 Air boots. Designed to withstand impacts and reduce wear, this durable replacement part keeps your boots in peak condition, ensuring a longer lifespan and enhanced stability during rides. Whether you're navigating rough terrains or high-performance tracks, this heel cup offers the ultimate protection and support for your boots. Sidi Asymmetric Heel Cup