It's in the bag. Big Agnes’ Lost Ranger 15 Downtek Sleeping Bag series offers warmth, compressibility and the Big Agnes System bag design. Lightweight enough for backpacking, these bags are designed like the comforter on your own bed. They provide a more comfortable and cozier sleeping experience thanks to semi-rectangle shape and Insotect Flow™ construction that keeps the insulation next to your body for more efficient heat distribution. They’re taller across the top so you can roll over more freely while the Free Range hood allows you to move unrestricted while staying hooded. The outdoors never felt so much like home.