This is a brand new Kelty Cosmic 0 Sleeping Bag in the Regular size (6' max, for average height men and taller women). It is filled with a down & synthetic fill called DriDown to maximize warmth and water resistance in relation to weight. It's one of the highest rated sleeping bags due to performing very comparably to $400+ sleeping bags at half the price. I purchased it from Kelty in September 2016. This is the 2016 model with the 600 DriDown. It retails for $220.Here's the Description from Kelty:Defend against chilliness with a sleeping bag that delivers impressive warmth. The Cosmic down 0°F is back and better than ever for 2016 with a new style and improved features. 600-fill hydrophobic DriDown™ insulation offers water resistance and loft that old man winter just can’t match. There’s also a durable down proof polyester ripstop shell and polyester taffata liner, and thermal comfort hood to keep you extra cozy when the mercury drops. Why worry about shivering when you have better things to do? Like sleep.