When the temperature drops, ditch the bulk and reach for the PRO Alpha Layer. Worn under your favorite shell, this innovative midlayer will keep you warm without overheating. Premium Polartec® Alpha Direct® fabric transfers moisture with breakaway speed, keeping you dry and comfortable throughout a wide temperature range. Three bellowed rear pockets hold ride essentials securely under a jacket and allow this top to stand on its own when you want to stash your shell on a long climb.