The Women’s MERINO 150 Base Layer Tank is ready to take on your next challenge with you thanks to the body temperature regulating properties and breathability of Merino wool. Core Spun technology wraps Merino around a nylon core for increased durability while remaining comfortable next to skin. The stretch merrow stitching wraps towards the front for a slim-fitting, feminine look. The classic racerback design is optimized for movement and comfort. The ultraviolet protection factor of +20 keeps you protected against harmful rays.