I've seen the Keens but I'm looking more for lightweigth, breathable shoes with closed toe and mesh sides to keep small rocks/debris out. Suggestions?

Greetings all! I found out about the dew point that, as many people mentioned, would accumulate condensation between the wall and insulation. However, the dew point is fluctuant and can vary under different conditions (e.g. temperature, humidity, pressure). This is why the condensation would be formed if only the dew point reached the space between the wall and insulation, but, I think, only for a short time. Please, help me sort out this issue. I would prefer Penoplex for insulation over the foam plastic (which I wanted to choose first) to protect it from an invasion of mice.