Bristlecone MF

$1,040.00 - $1,075.00
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Roomy -10° F winter bag

The Western Mountaineering Bristlecone MF is a roomy, comfortable winter bag that will keep you nice and toasty to -10° F. It has a wide 69" shoulder girth, so just about anyone will have plenty of room to roll around, and its 8.5 inches of loft is stuffed with over 40 oz of premium down. With its two zippers, the Bristlecone can be zipped to Western's mummy bags or unzipped to lie flat for use as a comforter. "Cold" has no meaning when you're hunkered down in this bad boy.

Like all of Western Mountaineering's bags, the Bristlecone MF is made by hand in San Jose, California. Their down is sourced from free-range mother geese who are never live-plucked or force-fed.


Brand Name:
Western Mountaineering
Temp Rating:
-10º F
Seasonal Usage:
Four Season
Temp Rating Celsius:
-23° C
Bag Style:
Fill Weight:
Reg: 42 oz / Long: 45 oz
Bag Loft:
8.5 inches
850+ Fill Down
Reg: 3 lbs 15 oz / Long: 4 lbs 3 oz
Bag Length:
Reg: 6 ft / Long: 6 ft 6 in
Circumference at Chest:
Reg / Long: 69 in
Circumference at Hips:
Reg / Long: 61 in
Circumference at Foot:
Reg / Long: 48 in
Made In:
Bag Shell Material:
20-denier MicroLite XP™: highly wind- and water-resistant and incredibly breathable microfiber
Bag Stuff Size:
Reg / Long: 10" x 20"
Other Features:
Full Down Filled Super Collar completely surrounds your neck for maximum heat retention
6 in. baffle spacing / Side Block Baffle keeps down where it belongs

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