Designed by athletes, for athletes. The lightest shoe in the On Cloudmonster family, its dual foam midsole combines max cushioning with max rebound. Max cushioning meets Helion™ HF for max energy return Forward-rolling, agile and fast Dual foam construction to maximize cushioning levels High-grip laces woven with silicone keeps you locked in Helion™ HF absorbs impact and gives maximum rebound A microfiber upper delivers breathability Developed with professional athletes Engineered woven upper made from 85% recycled polyester Fresh legs are fast legs Extreme CloudTec® is combined with Helion™ HF hyper foam for maximum cushioning with a kick. A dual foam midsole maximizes cushioning, while Helion™ HF in the forefoot absorbs impact for a rebound that will energize every stride. Developed by athletes The Speedboard® has been deliberately removed to encourage faster post-training recovery and to lessen the weight. The Helion™ HF hyper foam acts as a bounce board below your foot and propels you forward. For max energy return, max cushioning levels and hyper performance. Hyper details High-grip laces woven with silicone and reworked eyestays keep you locked in place – even during those powerful take-offs. Plus, a microfiber upper (made from 85% recycled polyester) delivers breathability and seamlessly molds around the foot to create a personalized fit.