UPPER: Upper in Lorica and Nylon mesh. Lorica is a hi- tech leather made from the most sophisticated technology. Lorica is a combination of the finest micro-fibres ever produced. It is water-repellent, permeable to water vapour and resistant to tearing, splitting, scratching and atmospheric agents. It has a good air-breathing capacity. Lorica offers exceptional performances and guarantees to the users extraordinary softness and elegance. SOFT INSTEP CLOSURE SYSTEM: The wide, anatomical and padded strap has been reduced and coupled to soft, thermo-formed material increasing comfort and performance. It distributes pressure evenly over the arch area, adjustable from both sides for perfect centering. The system eliminates the need for the High Instep Extender. Used with SL and Caliper buckle straps. Serviceable and replaceable. CLIPER BUCKLE:The micrometric closure called caliper buckle ia regulated by lifting the central buckle. In order to completely open, lift togethet both side buckles, while to slightly loosen the closure during the race the central clip must be lifted. HIGH SECURITY VELCRO: High security Velcro straps with integrated locking polymer teeth, that engage onto each other when the strap is closed. This feature makes the closure more secure and the strap becomes unmoveable. HEEL: The reinforced heel keeps the foot in position and avoids the shoe being deformed by extreme performance or prolonged pressure. SOLE: NEW CARBON LITE SOLE The Carbon Sidi sole is compatible with the best road pedals on the market.