Sidi Wire Carbon Vernice Road Shoes feature adjustable heel retention device, techno 3-system and soft instep fastening device to make your feet feel the most secure they possibly can. Suitable for use with both road and MTB cleats. The Wire shoe is for the rider who wants ultimate fit and performance from their footwear. The incredible new fastening system adapts the upper shoe to the shape of the foot, with Sidi's Adjustable Heel Retention Device ensuring a snug fit all round. The tight fit gives incredibly efficient power transfer, with comfort maintained by the Vent Carbon Sole. No compromise.