New without box Pet and smoke free home. See pictures for details The Rundown The Carbon X is a formidable competitor. This high-performance shoe features a specially-engineered carbon fiber plate and an aggressive Meta-Rocker designed to provide an efficient, propulsive ride. Our PROFLY X technology - a special combination of foams, employed with our trademark geometry - delivers an inherently stable, soft and responsive experience. Completed with a lightweight upper scrutinized through the lens of speed, the Carbon X is designed to empower athletes to fly.