I wear these when it gets bad hot, say above 90F in humid TN. Not the quality of my Sidis, but much cooler. I wish they came in a low cut.
http://www.cyclegear.com/CycleGear/...r-Leather-Motorcycle-Boots/p/28182_59409_1501
http://www.cyclegear.com/CycleGear/...r-Leather-Motorcycle-Boots/p/28182_59409_1501