Product Description Extra-large all-weather sleeping bag. Durable two-way zipper, thick taffeta shell, flannel Lining, mummy-style hood, inside pocket. Includes stuff sack with compression straps. Right and left-hand zippers let you zip together two Celsius XL -18C/0F bags. From the Manufacturer An extra-large bag ideal for campers of any size, the Celsius XL -18Ã¯Â¾Â°C/0Ã¯Â¾Â°F has SuperLoft Elite four-channel hollow fiber insulation to keep out chill on fall, spring, and summer evenings. The bag comes with all the bells and whistles of more expensive bags: shoulder and zipper baffles, adjustable mummy hood, interior storage pocket for valuables, and an Oxford compression sack for easier packing. Compatible with TETON Sports XL Sleeping Bag Liner for extra comfort and easier cleaning. The bag also offers zippers on both left and right side, so you can zip two TETON Sports bags together and create a double bag for couples. Just be sure to order one left-hand and one right-hand zip. For a definition of left- and right-hand, visit www.tetonsports.com.