The ON Cloudmonster 2 takes cushioning and energy return to the next level. With the largest ever CloudTec® for maximum comfort and a nylon-blend Speedboard® for powerful propulsion, it supercharges your run. Reworked dual-density Helion™ superfoam adds bounce, while a forefoot foam insert absorbs impact for an incredibly responsive, cushioned ride. Polyester Upper, Nylon-Blend Speedboard®, CloudTec® Technology, Dual-Density Helion™ Superfoam, Foam Insert, Lightweight & Flexible, Branded Details, Style Code: 3WE10110106. This sneaker is designed for optimal performance and comfort, featuring a durable polyester upper and advanced cushioning technology for an unparalleled running experience.