Billabong Men's Tahiti 2MM Reef Walk Wetsuit Boot

I was hoping these would be better than Speedo water shoes. They're better made but still not perfect. There's no way to secure the ankle with a bungee or anything so sand does enter through the ankle. They're only available in full sizes and so I bought a half size up, so maybe that's the issue too. Maybe try buying a half size down and sand will stay out.