The SIDI Rex Upper Brace is designed for riders looking to maintain the structural integrity and performance of their Rex and Rex Air boots. Crafted to provide superior support to the upper section of the boot, this replacement part ensures a snug and secure fit for high-intensity rides. Available in various colors, including black, black/grey, and black/red, the brace comes in sizes ranging from 39 to 48. Easy to install with all necessary mounting hardware included, the SIDI Rex Upper Brace is the perfect solution for restoring the durability and comfort of your boots.