A formidable competitor, the Carbon X is a high-performance racing shoe that features a specially engineered carbon fiber plate and aggressive Metarocker™ for a smooth transition through the gait cycle. Employing a unique combination of foams, our PROFLY X technology utilizes trademark geometry to deliver an inherently stable, responsive experience. Maximally-cushioned with minimal weight, the Carbon X empowers athletes of all levels to fly. Heel-Toe Drop: 5 mm. Weight: 8.6 oz.