Wool workout wear warms you up, cools you down. "While synthetics are passive, Merino wool is active, reacting to changes in body temperature to keep you warm when you're cold, but releasing heat and moisture when you're hot,” he said, noting that wool performs equally well during indoor and outdoor workouts. "The best part is that wool naturally reduces chafing, odor and dries incredibly fast." Check out Minus33 in the article by Yahoo! and Good Morning America! Read it here!