Temperature and moisture regulating
That wool can keep you warm in winter, you already know. But merino wool also keeps you cool in summer. Merino wool can take up to 35% of its own weight in moisture, without feeling wet.
Special protein molecules in the wool destroy odour forming bacteria. Simply hang to air during the night and you are good to go again in the morning!
Although you don’t have to wash merino wool too often, it can happen that you get an overly active hug from your horse.. Just put your shirt in the washing machine and wash it at 30 degrees. Don’t put it in the dryer.