OK everyone, don't laugh, it just encourages him. <img src="/forums/images/graemlins/grin.gif" alt="" /> Hey, I love puns and even I avoided that one.

Now back to our regularly scheduled program. From what I read, I though the idea was that once you reached essentially 100 per cent humidity in the vbl bag, you'd stop sweating because the evaporation would stop. Not so?

The reason BWP fabrics work is based on the differential between higher temp and humidity inside a jacket (as an example) and the outside lower temp and humidity. Therefore, if you trap the humidity in the bag, there is no differential, therefore no more sweating.

I thought this is why Gore-tex or eVent doesn't really work in warm muggy weather and you may as well wear anything. I've worn nothing but shorts and a light wool pullover over Capilene in cold, light rainy weather (above freezing, like mid 40-50's and as long as you don't mind feeling a bit clammy as the wool wets out, you aren't really cold. Works for sheep.

JAK wears wool a lot, sound right to you?