The Women's Merino Fusion Base Layer Long Sleeve is the first layer that checks all of the boxes. Sustainably made from our merino wool and bamboo fabric, this buttery soft, non-itchy long sleeve will keep you warm while naturally wicking moisture from your body to keep you comfortable. Featuring 4-way stretch to move with you and thumbholes to keep your sleeves in place during each stride. Style #TW780.

Model is 5'6 and wearing a size XS.