Review on Men's Black Athletic Water Shoes by Speedo for Sports and Outdoor Activities by Tre Boyer

I wear 9.5 US and tried 10 first but they were too big. So I returned them and ordered $9, they fit almost perfectly but maybe a little big. I would say they are almost a size larger than regular trainers etc. The shoes themselves are very stylish and comfortable but my problem is that they slide off the back when walking. I don't know if that happens in water or on sand, but on concrete they start slipping after 20 meters. I decided to keep them to try them out for what I bought them for (the beach). I hope they will work, but right now I'm skeptical. If it wasn't for this issue I would rate these 5*. Could it be my legs or the way I walk? Every step is different. But this is the first pair of slip ons I've had such a problem with. I've read some reviews that say if the back was higher they would be great and I have to agree with them.