[shell] MicroLite XP (polyester microfiber) Made in USA 6IN Spacing/V-Block Side Baffle 64IN/39IN (Shoulder/Foot) Girth Full Down Collar and Interlocking Draft Tubes to keep you warm 9IN Loft, -25° F Temperature Rating 3 lbs. 7 oz. Total Weight with 36 oz. of Down Fill Known by Volcanologists the world over you'd think this Western Mountaineering Puma MF Down Sleeping was filled with high lofting lava! 9.5in of loft , 36 oz. of 850+ fill power down, two densely packed Interlocking Draft Tubes and a full down filled collar will keep you in the ring of fire till 25 below zero. Its VBlock Side Baffle provides phenomenal down control, so necessary in a bag with this much loft . You get a 64in shoulder girth so that there's even room for layering. The MicroLite XP shell has superior breathability while being extremely water resistant. This bundle of warmth weighs in at just 3 lb. 7 oz. total weight. Size: 6ft 0in Length Rating: -25° F Loft: 9.5in Inside Girth (shdr/hip/foot): 64in /56in /39in Fill Wt: 36 oz Total Wt: 3 lb 7 oz Stuff Size: 10in x 20in