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Western Mountaineering - Bristlecone MF

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.

International Restrictions Apply

Technical specifications & features

Weight Reg: 3 lbs 15 oz / Long: 4 lbs 3 oz
Gender Men's & Unisex
Color Green
Made in USA
Temp Rating º F -10º F
Temp Rating º C -23° C
Bag Style Semi-Rectangular
Seasonal Usage Four Season
Insulation 850+ Fill Down
Fill Weight Reg: 42 oz / Long: 45 oz
Bag Shell Material 20-denier MicroLite XP™: highly wind- and water-resistant and incredibly breathable microfiber
Bag Length Reg: 6 ft / Long: 6 ft 6 in
Bag Stuff Size Reg / Long: 10" x 20"
Bag Loft 8.5 inches
Circumference at Chest Reg / Long: 69 in
Circumference at Hips Reg / Long: 61 in
Circumference at Foot Reg / Long: 48 in
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

Product Reviews

I Love My Bristlecone Bag
I purchased my W.M. back in 2001 (back when it was a lot more affordable) and, I found it to be a great sleeping

bag. In this bag one gets what they paid for. The quality of the sleeping is fantastic -I sewed a sleeping bag 'kit'

back in the 1970s so I know quality when I see it.
I do a lot of snow camping and do not have any complaint, it is very roomy inside but, there were no gaps which

let in any cold air.
One thing I loved so much is I requested and recieved an XXL stuff sack (for the next larger size sleeping bag) and over-size storage sack. Review by avon1944
One outstanding sleeper
Does pride of ownership mean anything to you? Does being warm no
matter what mother nature throws at you sound appealing? Does the ability to toss and turn inside your bag sound like a better way to sleep? Are you willing to pay a bit more for an exponential gain in quality and substance?

If you found yourself answering yes to the above then look no
further than the Western Mountaineering Bristlecone MF. In my opinion this is the Da Vinci of sleeping bag design and execution. Rated for -10 F this bag is uber warm and adaptable. Various zipper configurations allow you to tailor the bag to your requirements from wide open like a comforter to zipped tighter than a can of tuna.

The Micro Fiber shell and interior is ultra soft and comfortable,
beefy draft tubes cover all zippers and an adjustable draft collar and hood insure you can seal out the elements and seal in the heat. The zippers are backed by the most fail safe snag free tape I have seen on a sleeping bag. No midnight fears of the dreaded zipper snafu when its dark, you’re tired, and mother nature calls.

I have the long model at 6-6 which leaves plenty of space for
clothes or other items at the foot for warm wear in the mornings. I am not overly large. At 5-10 215lbs however, I found my old bag was just too narrow for ultimate comfort. With the Bristlecone, there is plenty of room to move comfortably inside the bag without the claustrophobia that many bags exhibit.

Granted, this bag is not ultra light and its stuff dimensions are
not the size of a water bottle but the trade off in size delivers in spades on the comfort and warmth level.

While my backpacking days are over, I would still carry this bag
in a pack if warmth and comfort were my goal. Currently I use the bag for car camping, paired with a cot and dream time air/foam mattress from Cascade. The only thing missing is a cover turn down and mint on the pillow at bed time.

If you can afford it, I encourage you to purchase this bag for
your cold weather adventures. It will not only keep you toasty warm, it will make you smile with pride every time you crawl into it. Don’t be surprised if you find yourself sleeping in a little longer in what is truly the benchmark by which all other bags should be judged.

Review by Mobettacampa

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