Tested with athletes for marathons and half marathons. The CloudTec Sphere™ cushioning system is built for a fast ride, with an ultralight Lightspray™ upper. Includes the Elite Run Sock High Hyper. CloudTec Sphere™ cushioning system engineered for fast runs Lighter, resilient Helion™ HF hyper foam for energy return Lightweight, seamless LightSpray™ upper Carbon Speedboard® and high-grip rubber outer Co-created with athletes Elite Run Sock High Hyper included Support: Neutral Heel to-toe drop: 5mm Weight: 158g