100% Merino yarn provides the full power of Merino with unparalleled moisture management, insulation, thermoregulation, and odor control SW016144 3D mapping results in near custom fit and freedom of movement while ribbed elbows provide added durability. Knit-in reflective elements enhance visibility in low light conditions Slim Fit In excellent used condition. Please refer to pictures for more detailed information. I am happy to answer questions and post more photos. I am open to reasonable offers and bundles. I have more outdoor/activewear in my closet!