Sidi’s Genius 6.6 Carbon shoe is d esigned for the high-performance, high-mileage cyclist. The patented Full Carbon Sole balances power transfer and foot health . The Heel Security System prevents power robbing heel lift shoe has a new vented, reflective heel cup. The breathable, supple, durable Lorica Microfiber Upper keeps feet comfortable with cooling mesh inserts. The Caliper buckle allows for easy on-the-bike fit adjustment and the soft instep closure system and padded tongue eliminate pressure points. Another feature unique to Sidi, the High Security Velcro® won’t shift or slip.