|Sidi's top triathlon-specific shoe. Vent Carbon Sole: same stiffness as the Carbon Lite Sole, 38 grams lighter, with vents that can be opened and closed for 4-season comfort. The vent features a sliding cover that leads to two longitudinal channels that direct air underneath the perforated footbed and helps drain water after wet transitions. The triathlon-specific upper has a plush, brushed interior with minimal seams for sock-free comfort. Notched top strap opens away from the drivetrain and large heel loop for fast transitions. Replaceable heel pad. New for summer 2013, the 'Air' perforated upper provides extra ventilation for those riding in warmer climates. Compatible with 3-bolt road style cleats. Made in Italy.