Have to say I was skeptical about the claim of 'no odor'. However, after wearing the same shirt for 2 vigorous days of hiking at Mt. Baker, and another for 2 hikes at Mt. Rainier, not a whiff of stink! I worked up quite a sweat both hikes and the shirts dried quickly, but without leaving me chilled. I purchased the shirts only a wk before leaving on a 2 wk. trip and sizing was wrong for one shirt; customer service was EXCELLENT, with a replacement sent immediately and in time for the trip. Very pleased with my purchase. These are good folks at WoolX!