Performance begins at the base, with a layer built to respond the moment you move. The Atomic Baselayer Long Sleeve W wraps warmth, softness, and breathability into a seamless design for skiers who move with purpose on the mountain. A merino wool blend fabric balances heat and moisture management as conditions shift, while body-mapped zones deliver warmth and airflow exactly where it’s needed. Smooth, stretchy, fit to form. Seamless, four-way knit construction enables unrestricted movement. A technical women’s long sleeved baselayer top you can count on.