Looking for the perfect, natural, ultra comfortable, temperature regulating tee or top? You’ve come to the right place. You’ll stay warm and comfortable through a wide range of temperatures in one of our lightweight Merino Wool Tops. Made with premium, superfine Australian Merino Wool, and with six generations of wool know-how, our high-performance merino thermal t-shirts and tops are suitable for all sorts of outdoor activities and adventures. That’s why the people who know, go with io. Because it’s incredible outside.