The Big Agnes Whiskey Park 0 Degree Sleeping Bag is a cold weather bag with a wide-cut rectangular shape for those who like spacious comfort. The bag is packed with Thermolite; Extra Insulation that's designed to mimic the loft of down clusters, while providing hydrophobic and quick-drying Performance in wet weather conditions. Rather than insulating the bottom, this bag has a stretchy insert that can accommodate sleeping pads of different thicknesses. This way, you have an integrated sleep system that prevents shifting around on your pad for a steady nights sleep. Dual full-length zippers allow for easy entry from either side of the bag and can be used as a convenient way to vent. Tighten down the hood cinch to keep cold winds out, or unzip it all the way and sleep comforter-style for more freedom to sprawl. Features of the Big Agnes Whiskey Park 0 Degree Sleeping Bag Big Agnes removed the Insulation from the bottom of the bag and designed it to be used with a corresponding sleeping pad, thus providing an integrated sleep system with everything you need and nothing you don't New design improves connection between pad sleeve and bag providing a roomier sleeping space without adding bulk New contour allows the bag to drape around you, increasing Insulation Performance Stretch fabric panels on the side of the pad sleeve accommodate different pad thicknesses Corner hand pockets allow top of bag to be wrapped around shoulders much like you might with a comforter in a bed Double zippers allow entry from either side of bag and when unzipped allows top of bag to be used like a comforter Free Range Hood increases ability to lift and move head even when zipped Pillow Barn in hood holds camp pillow One hand hood cinch cordlock is simple and easier to use Zipper Garage stores zipper and eliminates Velcro Integrated full pad sleeve Rectangular shaped bag Liner loops YKK #8 zipper Park bags mate easily Nylon stuff sack Exterior loops for hang drying or storage