With a form-hugging and body-enhancing slim fit, our Women's Classic All-Season Merino Lace Base Layer Long Sleeve tee is a delightful blend of comfort and functionality. It's designed so that the next-to-skin benefits of responsibly sourced Merino wool (moisture management, temperature regulation, and odor resistance) mix with the durability of a nylon core. And this tee's lightweight lace adds to its breathability. With performance at its heart, this tee is a great first layer for cool- or warm-weather, high-energy activities like hiking, jogging, or rowing crew.