Sparco Prime Extreme Racing Shoes - FIA 8858-2018The Sparco Prime Extreme Racing Shoe, FIA 8856 2018 Approved, features an extremely light weight fabric that has been developed to be breathable and durable. The cloth upper gives support from the toe box to the heel. This also features a carbon fiber sole. This carbon fiber is unique because it has been developed to be flexible, and it is inlayed into the sole which runs from the toe to the heel. Carbon Fiber is visible through the window of the