Sidi Wire Vent Carbon Limited Edition Black European Road Shoes MPROVED Vent Carbon Sole: Same incredible stiffness with closeable vents Adjustable Heel Retention Device eliminates heel lift.  NEW Comfort Fit insoles with memory foam for lightweight support. Lighter, more ergonomic Soft Instep Closure System and padded tongue eliminate pressure points. ALL NEW Tecno 3 buckles independently adjust fit across the forefoot and toe. 60 grams lighter, per pair, compared to Ergo 3.