Design: Engineered mesh upper made from 100% recycled polyester Speedboard® made from a lightweight and flexible nylon-blend for maximum propulsion In-Shoe Comfort: The heel, tongue, and inner are made using ultralight materials to ensure maximum breathability and comfort Helion™ superfoam for ultimate comfort Durability & Traction: Rubber compound with grip-enhancing tread pattern Additional Details: Heel-to-toe drop: 8mm