The Mountain Hardwear Mt Eyak/2™ Vest is a lightweight, low bulk insulating piece for any time you need just a bit more warmth in the core. Layer it under a shell for active cold weather pursuits, or toss it on over a sweater to wear around town. With 600-fill RDS-certified down, great baffle design, and a DWR finish, this vest is as well-made and versatile as they come.