Thanks Jake. That was great. In addition, on warm humid days, wool does the same thing, i.e. wicks away moisture, thereby cooling the skin. I once worked for a logging company and the owner (one of the smartest men I have ever known) wore a Pendleton long sleeve wool shirt 365 days a year. His claim was that he stayed as cool in his warm shirt as the rest of us did in a cotton T shirt. Whodda thunk?