Thanks, I appreciate the suggestion. I'll give that a try. I gotta say that if you look closely at the "air vents" on Bonts, you might think differently about what they are doing. Compared to those on other shoes, they are not functioning in the same way. The interior lining of the Bonts covers the vents and makes their cooling effect minimal at best. Hold the shoes up to a light and look inside, you'll see what I mean.

I'll give your suggestion a try nonetheless. Can't hurt.