The Big Agnes Buffalo Park 40 Degree Sleeping Bag is a synthetic sleeping bag for larger hikers or those that love plenty of room to move around in through the night. Sleep easy when you've got the space to move in your bag and let the Thermolite; Extra Insulation work its magic to keep you warm. The pad sleeve Fits a 25" wide rectangular pad, so slip one of those puppies into the pad sleeve and get your snooze on. Features of the Big Agnes Buffalo Park 40 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 2 x 62in./ 157cm YKK 8 zipper Park bags mate easily Nylon stuff sack Exterior loops for hang drying or storage