The Kinetic Merino 150 long sleeve crew base layer combines natural odor-resistant merino wool with exceptional moisture-wicking capability spun around a nylon core for increased durability and elasticity. The next-to-skin comfort is enhanced by the flatlock seam construction and comfortable 18.5-micron count. Built for any adventure, the TUO Kinetic Merino 150 crew eliminates the decision of what to pack first and allows you to match the rest of your layers to activity and condition.