On Running Cloudspark (Womens) - Ivory/GlacierOn Running Cloudspark (Women's) Ivory Glacier Made with more runners in mind. This high propulsion shoe is ideal for road runs engineered for people who run in a seated position. Expect max air time and powerful take offs. Maximum energy return Less ground contact. More air time. Why? A propulsive running sensation, ideal for people who run in a seated position. It's an ultra comfortable, forward rolling ride with a flexible Speedboard that delivers