The Hoodlum is a head warming accessory. It uses any of our 10D or 20D colors as the accent color (the stripe down the center, and one of 4 darker 10D colors for the primary color (two side panels). The Hoodlums long neck collar comes down to fit well with any of our Enlightened Equipment sleep systems, or can be used on its own. The face enclosure can be left open or snapped closed, to leave more or less airflow as desired. A thin, light shock cord runs over the forehead and around to the back of the hood, which allows you to comfortably secure it to your head, allowing you full range of motion without obstructing visibility, and when you want the hood to cover your eyes to sleep, just pull the cord over the front of the hood and cinch it down tight. One size fits most.