So far so good on these. I am running the Fool Run (a mud race for pets and their owners) in August and bought them. They fit as expected and are waterproof enough to keep my feet dry when walking on grass. I have fairly wide feet (3E in regular shoe size, XW or XXW in most athletic shoes). These shoes are narrower than other NB shoes I have. So if you have a very wide foot you might be disappointed.