My own experience with wool & heat comes from my reenacting days. As Jimmy stated earlier, wool "breathes", so it really is not an uncomfortable material to wear in the summer. Here in Southwest Missouri we have some hot summer days in July & August with high hudmity, and the wool kilt just really isn't that bad to wear, although I must confess that I hate heat personally.

When I was doing the reenacting thing, many times a tourista would come up ask "are you hot in all that clothing" -- I would point out that wool does breathe, and that my skin was not directly exposed to the sun as theirs was in a t-shirt and shorts, which makes you much hotter in my opnion.

Cheers,

Todd