Get Schooled in the Geometry of Comfort | Our Cosmic sleeping bag was already giving you a workhorse for the price of a pony. Now, you can get your hands on a legit unicorn with pony pricing still in play. The Cosmic is an outdoor superstar with cozy 550 Fill Down and a buttery-soft, durable 20D nylon shell fabric that will have you daydreaming about more qt under the stars. Let's just say there's a reason it's our most popular bag