A super trainer for long runs and tempo runs. Featuring a CloudTec® cushioning system engineered for a highly responsive ride and Helion™ HF hyper foam for max energy return Key features CloudTec® cushioning system engineered for responsive runs Helion™ HF hyper foam for max energy return With a bottom layer of Helion™ foam for durability No plate for less impact – to help keep legs fresh Strong, durable and breathable upper Re-engineered heel construction for multi-hour comfort Enhanced rocker shape for energetic push-offs Support: Neutral Technologies CloudTec®CloudTec® is a structural cushioning system. By engineering foam into a variety of specialized geometries, we create a spectrum of sensations. One for every run and runner. Reacting to your unique movements, it compresses horizontally and vertically to absorb impact and deliver multi-directional support. Helion™Helion™ foam is designed to support every step of your run. So you can feel comfortable and controlled - mile after mile. Engineered for versatility, Helion™ fuses dynamic cushioning with stability where you need it most. Helion™HFHelion™ HF is an ultralight hyper foam made to maximize running efficiency. With a unique composition optimized for rebound and responsiveness, it delivers higher energy return. So you can feel the rush of effortless speed in every stride. Cushioning What does Cushioning mean? Cushioning: Medium-High LowMax Responsiveness What does Responsiveness mean? Responsiveness: High GentleMax Stability What does Stability mean? Stability: Medium NeutralStable Long runs and tempo runs A super trainer for long miles and fast tempos. Designed for maximum cushioning and enhanced impact absorption, while bringing back the responsive, forward-rolling ride you love. Highly responsive ride The CloudTec® cushioning system has been engineered for a highly responsive ride. Made with a top layer of Helion™ HF hyper foam for max energy return and impact absorption, plus a bottom layer of Helion™ foam for durability. A secure, breathable fit The engineered knit upper features targeted zones for breathability, while the enhanced tongue design delivers step-in comfort and a secure lockdown. Description Courtesy of ON