I bought these for Iceland and they did great. We hiked around over rocks, water, went behind waterfalls, and went on a glacier hike (with crampons) and they stayed dry. They are very lightweight and flexible. My husband was jealous because his boots are heavier. I would recommend breaking them in a bit prior.  I typically wear an 8 to 8 and 1/2 in sandals and a 9 in boots and running shoes, so I went with the nine and they did great.