The MAGIC SPEED? 4 shoe is designed to support your racing goals. In addition to the softer cushioning experience, this shoe helps create better stability throughout your stride. ?A sculpted carbon plate is designed to help improve stability and propel your foot forward. This helps create a smoother and more propulsive experience during the toe-off phase of your stride.?Additionally, this shoe is updated with FF TURBO? cushioning, which helps you experience a more energetic toe-off during tempo runs and races.