Englin's Fine Footwear presents the women's 'Cloud Waterproof' from On Running. Perform in all conditions with the world's lightest fully cushioned shoe made waterproof. Never Not On. This Runner gives the urban explorers the ability to stay dry in wet situations. On Running's goal is to keep you moving no matter what the forecast says. This lightweight shoe, believe it or not, is fully waterproof. We recommend buying half a size up for waterproof models.