The fan favorite, evolved. The Cloudsurfer 2 features refined CloudTec Phase(R) cushioning for an even smoother ride, plus a fresh mesh upper for increased breathability. A new, computer-optimized outsole and tread pattern boosts durability Design: Re-engineered upper is made with 88% recycled polyester and features a more breathable mesh construction In-Shoe Comfort: Upgraded CloudTec(R) Phase cushioning offers an even smoother heel-to-toe transition, creating a supremely soft sensation underfoot Durability & Traction: Durable outsole with thicker padding and smaller cavities in the tread Updated geometry supports an even smoother ride Additional Details: Outsole crafted based on Finite Element Analysis (FEA) analysis Best for: Running, road running Heel-to-toe Drop: 8 mm