Nike Running Division Aeroloft 800 Men’s Vest, Black, Size XXL. Like New Condition. “Nike Aeroloft technology also debuted in the ultra-light Nike Aeroloft 800 Vest, designed to keep runners warm and comfortable in cooler conditions. Insulating down has been combined with precision ventilation that allows heat to escape the body so athletes stay dry. The ultralight and packable Nike Aeroloft 800 Men's Running Vest helps keep you warm on cool runs without weighing you down. Lightweight Warmth Perfect for wearing over your favorite running shirt, this cool-weather layer features 800-fill goose down insulation for superior warmth with little weight. Ventilation Perforations of varying sizes allow excess heat and moisture to escape. Zones of perforated ventilation are alternated with zones of lofted insulation to keep just enough heat in while letting moisture out. Packability The packable design of this running vest allows you to stash it in the back zippered pocket, providing convenient storage when you need it. It also features a hand strap for easy carrying while running. Freedom to Move The streamlined design and elastic materials let you move without restriction. More Benefits Reflective back zip pocket for secure small-item storage. Nike Running Division Aeroloft Vest Outerwear Gorp Gorpcore Athleisure Work-out Gym