A solar chimney effect. That's pretty sweet. The clothing would have to be robe-like, though, which is impractical for racing.
I'd think thin, ventilated cloth that was white on the outside and black on the inside would be ideal for running in hot, dry weather. It would aid heat elimination via radiation, allow convection, and shouldn't affect conduction. Trapping air near the skin during heavy exercise would be useless because it would prevent evaporation and likely heat above 98.6.
On Saturday, July 14, 2012 12:07:01 PM UTC-7, runs_with_kona wrote:
I think the bedouins know a thing about staying cool in hot dry weather.