Get ready for life in the fast lane. A tip-of-the-spear product tuned for race day . the Cielo X1 3.0 delivers our lightest super shoe to date. Ultra-light and unquestionably snappy . we've shaved significant weight since launching our last iteration. A must for speed seekers . this pace-pushing racer enlists a propulsive carbon fiber plate . ultrasoft PEBA foam . asymmetrical lacing . and a grippy outsole for ultimate traction when chasing those PRs.