Western Mountaineering Bristlecone MF

Bristlecone MF - Extreme Warmth Meets Expedition Comfort When bitter cold and unforgiving conditions are part of the adventure, the Bristlecone MF delivers spacious comfort and serious warmth. Designed with a wide semi-rectangular cut, this bag provides extra room to layer up, shift positions, or simply stretch out-without compromising insulation. Packed with 850+ fill power goose down, it offers exceptional loft and heat retention, while the MicroLite XP(TM) shell delivers reliable durability and water resistance for extended time in harsh environments. A full down-filled collar and draft tube ensure that warmth stays locked in when temperatures plummet. Built for Arctic expeditions, high-altitude base camps, late-season hunts, and deep-winter adventures, the Bristlecone MF is for those who demand reliable warmth, extra space, and the confidence to sleep soundly when the mercury drops. Filled with 850+ Fill Power ethically-sourced premium goose down Side block baffle construction for better control of insulation in colder weather Full-length #5 YKK zipper provides a smooth, easy unzipping experience while saving weight Insulated Draft Tube and Full Collar keep the cold air out and warm air inside to prevent heat loss Durable 20 denier MicroLite XP(TM) outer shell stays more breathable and water resistant longer than traditional polyesters Dual zipper design allows sleeping bag to open completely for greater temperature regulation Comes with ultralight stuff sack and breathable storage bag 3 lbs. 15 oz. Total Weight Shape Semi Rec (w/ full collar) Temp Rating -10AdegF Fill 850+ Power Goose Down Color Forest Green/Black Country of Origin USA Fabric 20D Microfiber Loft 8.5" in Inside Girthshdr/hip/foot 6&';0" 69"/61"/48" 6&';6" 69"/61"/48" Fill Weight 6&';0" 42 oz 6&';6" 45 oz Total Weight 6&';0" 3 lb 15 oz 6&';6" 4 lb 3 oz Stuff Size 6&';0" 10"x20" XL 6&';6" 10"x20" XL