The Brooks Carbonite Vest is perfect for keeping your core warm and dry, while also being visible in the dark. This lightweight vest is great if you are running before sunrise or walking the dog after work because you can throw it on over your outfit. The Carbonite Vest protects against the wind and water. Brooks updated its DriLayer® Seal fabric to give it more stretch than before, plus the breathable fabric lets excess heat out without letting the elements in. This vest is made to keep you visible while running in the dark. Brooks strategically placed 3M™ Scotchlite™ Carbon Black Stretch reflectivity in critical motion zones to help drivers recognize you as a runner in motion. Plus, the vest has secure storage to keep your personal items, including two zipper hand pockets and a chest pocket.