Worn on a cruise. I walked on hard pavement, sandy beaches, and in water that contained lots of small rocks and shells that weren't comfortable walking barefoot. It was convenient to walk with them on the water, and they stayed on their feet. On a sandy beach, sand accumulated in it, but it was pretty easy to clean. Since they were new I had an issue with a strap on my back chafing a sore on my left leg. I wonder if I tightened the strap and it moved and rubbed against my foot like it onlyβ¦