Sidi Wire Vent Carbon Road Vernice- Red White 45.5 Two Tecno 3 precision ratchet closures independently micro-adjust fit across forefoot and toe. Vent Carbon Sole with open/close vents for 4-season comfort. Replaceable heel pad and a replaceable integrated toe pad/vent cover. Adjustable Heel Retention Device: Eliminates heel lift for optimized pedaling efficiency. Comfort Fit insoles with memory foam for lightweight support and antibacterial treatment.