NIKE Running AeroLoft 800 Flash Vest Size: S This is a flash-enabled running vest, which is no longer available. This reflective print vest uses 800-fill-power goose down for exceptional warmth and high performance. It features elastic binding on the armholes and hem for a comfortable fit. Laser-cut Nike Aeroloft technology releases heat. Packable design with a handle for easy carrying. Shipping via Takkyubin Compact. No stains, tears, or odors.