Lake Race 100% Carbon Fiber Sole. Available in 3 hole cleat pattern. CX302 utilizes Lake’s patent double sole system. The inner sole is a semi flexible carbon fiber platform that allows the foot to have some flexibility at the ball of the foot where the foot tends to swell and typically hot spots or numbness would occur. The inner sole is suspended over the outer rigid carbon sole. This system enables us to use an extremely stiff carbon outsole without sacrificing riding comfort.