with Helion HF gives you high energy return for pacy training sessions without feeling the impact on your legs the next day! The Ultimate Athlete Training Shoe. Developed with constant athlete feedback, the Cloudmonster Hyper is the ultimate athlete training shoe without carbon fiber to accompany the Cloudboom Echo race day shoe. Best in class materials. Helion HF superfoam, high performance engineered lightweight woven, best in class ingredients in every detail. The Cloudmonster Hyper is a true supershoe. Maximalist CloudTec® combined with our new Pebax® hyper foam for extreme energy return. Upper Engineered mesh made of 92% recycled polyester Midsole Top Midsole: Helion™ HF hyperfoam made of Pebax® Bottom Midsole: Helion™ Superfoam Outsole Grip rubber compound with enhanced traction pattern. Ride is forward rolling. Engineered to encourage forward momentum, with enery return you can feel.