Fit & Design: Slim fit follows contours of the body Knit-in reflective elements enhance visibility in low-light conditions Ribbed elbows provide added durability Long sleeves Quarter zip Merino yarn: unparalleled moisture management, insulation, thermoregulation and odor control Insulating terry loops seamlessly paired with mesh ventilation Can wear comfortably with a pack Technology: Intraknit(TM) technology: Insulation, articulation and ventilation: seamlessly integrated to amplify movement and comfort during high-intensity activities