On Women Cloudflow 5 - Ivory / SeedlingThe training shoe for fast intervals. With Helion HF hyper foam and a nylon blend Speedboard for high energy return. Regular. True to size. Materials Upper Unit: Nylon, recycled polyester Bottom Unit: Outsole: Rubber Speedboard: PA11 8% GF Technology: CloudTec Key features Weight: 231g A layer of Helion HF for max energy return and rebound Propulsive glass fiber nylon blend Speedboard Engineered woven mesh upper that's breathable and ultralight Design