TCX S-Race Boots Radically re-styled for 2011, the S-Race incorporates all the technology from its predecessor, the Competizione RS, while offering a freshly evolved and narrower TCS (Torsion Control System) and MCS (Metatarsal Control System), for a closer, more precise fit. This allows for better bike feel while grabbing gears through the Ss. Made of Lorica reg for better abrasion resistance, longer wear and durability. Also with replaceable sliders. UPPER micro fibre with micro-injected inserts and padded front area for a better comfort and flexibility LINING AIR TECH breathable, suede leather insert in the heel area for a better fitting PROTECTION polyurethane shin plate with 2 iron mesh air intakes polyurethane shift pad SLIDERS replaceable high-resistant alloy toe slider with hidden screw system, polyurethane calf slider CLOSURE zip and Velcro band MID SOLE antibacterial, reinforced SOLE 3 colors injected with specific grip area