Performer Boots Sidi Shin Plate with Air Channels: Shaped shin plate with air channels for protection and comfort. Arch and Ankle Support: Soft arch area and internal/external ankle pads for added support. Calf Exhaust System: Soft polyurethane calf exhaust with mesh protection for ventilation. Heel Cup for Adherence: Smooth heel cup enhances grip on the bike. Smooth Gear Shifting: Shift pad for precise and smooth gear changes. Easy Zipper Operation: Zip Elastic Panel for smoother zipping, aided by elastic flexibility. Customizable Slider and Top Sole: Replaceable slider options (nylon, ceramic, or aluminum) and durable rubber top sole for a personalized and long-lasting boot.