MicroLite XP (polyester microfiber) Made in USA 6IN Spacing/Sideblock Baffle 69IN/48IN (Shoulder/Foot) Girth Full Down Collar 8.5IN Loft, -10° F Temperature Rating 3 lbs. 15 oz. Total Weight with 42 oz. of Down Fill No cold can turn you away when you're hunkered down in your Western Mountaineering Bristlecone MF Down Sleeping bag. This bag is built big and warm and Big! 69in of girth at the shoulder and 48in of girth at the foot. Crammed with 42 oz. of 850+ down yields an unrelenting 8 1/2in of simmering loft that keeps you heated to -10°. A large draft tube and the down filled collar make certain that winter remains outside. With 2 zippers it can be zipped to our mummy bags or unzipped to lie flat. In spite of its roomy proportions the Bristlecone weighs only 3 lbs. 15 oz. Size: 6ft 6in Length Rating: -10° F Loft: 8.5in Inside Girth (shdr/hip/foot): 69in /61in /48in Fill Wt: 45 oz Total Wt: 4 lb 3 oz Stuff Size: 10in x 20in