Brand new, unused item. This is a high-performance running down vest. I think it can also be used as an inner down layer. It's lightweight and very warm. A vest suitable for chilly routes. This lightweight package provides calculated warmth. The soft, fluffy light panel on the front and advanced temperature regulation technology support body temperature regulation, keeping you warm even in harsh weather. With a zippered vent on the front, a drop-tail design that extends coverage, and a water-repellent finish to handle light rain, you're ready to move forward. Features • Nike Therma-FIT ADV technology combines advanced technology and features with temperature-regulating materials. Keeps you warm even on cold days. • Nike AeroLoft technology provides lightweight, warmth, and breathability. • Water-repellent material keeps you dry in bad weather. • Two zippered side pockets securely store your essentials. Product Details • Body: 100% polyester, Lining: 100% polyester, Body/Insulation: 100% polyester Panel Insulation: 85% down, 15% feather • Machine washable #NIKE #Running #Down #DownVest #AeroLoft #RunningDown Size: S