Road running, waterproof, Helion™ superfoam. Features: The supportive, feel-good running shoe; Helion™ superfoam midsole for big energy return; Upgraded outsole that won't trap stones as you run; CloudTec® cushioning to absorb impact; Plush tongue for total comfort and easy step-in; Durable heel clip and upper reinforcements for added support; High-performance waterproof membrane. Materials: Recycled Polyester. For professional athletes and new runners alike, our Helion™ superfoam is a game-changer. The upgraded midsole provides softer cushioning and higher energy return. Plus CloudTec® cushioning to absorb impact. So you can keep racking up the miles with confidence.. With its high-performance waterproof membrane, the Cloudrunner 2 waterproof can weather rainy runs. From toe to heel, each element of this next-gen supportive shoe is designed to keep you moving, come rain or shine. (And say goodbye to trapped stones, thanks to an updated outsole.)