My wife bought a similar pair last year and she rubbed my face all summer because her feet were clean when we left the beach and how full of sand I was. I haven't used them yet, but I know they work because of her. I usually wear a 10 1/2 in Nike tennis shoes and after reading a few reviews I settled on a 10 in these. They are also great for use without water. There is so much airflow; It's like wearing sandals but not looking like an idiot!