Sir I strongly suggest Belleville DES 390.

http://www.bellevilleshoe.com/

I have a pair that I wore in Iraq with street tempatures in excess of 150 Deg F.

I can not say enough good about them.

You get a rugged combat boot that feels like a sneaker.

I also was issued Belleville desert water proof & insulated winter boots that look like Belleville model DES 220, they are also very good.