Western Mountaineering Bristlecone MF

Manufacturer's Description

No cold can turn you away when you're hunkered down in your Bristlecone. This bag is built big and warm and big! 69" of girth at the shoulder and 48" of girth at the foot. Crammed with 42 oz. of 850+ down yields an unrelenting 8" 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.

Visit Western Mountaineering's Bristlecone MF page.

Retailers' Descriptions

Here's what other sites are saying:

Western Mountaineering's Bristlecone MF Sleeping Bag is a semi-rectangular bag built for subzero temperatures. Ideal for most winter endeavors, the Bristlecone's 850+ down insulation has the loftiest fill rating, resulting in the highest warmth to weight ratio available on the market. Unlike most water-resistant shells, Western Mountaineering's MicroLite XP fabric offers long-lasting weather protection. The MicroLite XP shell helps the down retain its lofty warmth in moisture-riddled environments. Western Mountaineering critically thought out the bag's design to the smallest details, making the Bristlecone a long-lasting and very versatile choice. A differential cut places more fabric at the lining to ensure maximum loft inside the bag, and continuous baffles allow you to shift the bag's down towards the top or bottom for more or less warmth. Hook-and-loop tabs let you pull the hood, draft tube, and draft collar farther or closer to you for customized coverage. Extra convenient features include dual zippers on the left or right side, a waterproof stuff sack, and a storage sack with a large volume that helps the bag retain its loft over time.

- Backcountry.com

"Western Mountaineering Camp & Hike Bristlecone MF -10 Sleeping Bag-Regular-Right 60BRISRZ. This bag is built big and warm and big 69 of girth at the shoulder and 48 of girth at the foot. Crammed with 42 oz. of 850+ down yields an unrelenting 8 1/2 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 other Western Mountaineering mummy bags or unzipped to lie flat. In spite of its roomy proportions the Bristlecone weighs only 3 lbs. 15 oz."

- CampSaver.com

The Western Mountaineering Bristlecone MF -10 Degree Sleeping Bag is a spacious sleeping bag for winter exploration. Rated down to -10&degF, if the wind is howling and Snow blowing outside your tent, you might as well climb inside and revel in the warmth of 42oz of 850+ fill power down. It's baffles Are packed so full you're getting an 8.5" loft, but incredibly it still only weighs 3lbs, 15oz. It Features two zippers so you can zip it together and snuggle close with another or lie it out flat in weather that is warmer. Quality, made in the USA craftsmanship, sweet. Features of the Bristlecone MF -10 Degree Sleeping Bag by Western Mountaineering Made with lightweight, weather-resistant MicroLite XP? shell fabric 6in. spacing of sideblock baffles prevents down migration 69in./48in. shoulder/foot girth gives you plenty of moving around space and room for adding extra layers when the temp drops Full down collar helps to seal in your body heat Large draft tube runs the full length of zipper, preventing cold drafts from disturbing your slumber 850+ down fill power provides excellent warmth to weight ratio and compressibility Can be unzipped to lie flat or zipped to compatible mummy bags 42 oz of down fill gives this bag 8.5in. of loft and a rating to -10? F 3 lbs. 15 oz. total weight Made in the USA

- Moosejaw

Built big and warm69 inches of girth at the shoulders and 48 inches of girth at the feet leave you plenty of room to spread out or warm up your gear Waking up to put on cold boot liners and layers sucks so dont Just stuff them in the lower portion of the Bristlecone for a more pleasant morning even on the coldest days Speaking of the coldest days the Bristlecone is crammed with 42 oz of 850 down to keep you warm Fully fluffed that equates to a simmering 85 inches of loft to keep you toasty down to 10 degrees fahrenheit A sideblock baffle at the zipper keeps heat from escaping through the zipper while a down collar stops heat escaping from the neck area without feeling claustrophobic On nights when its not that cold the bag unzips to lie flat as a blanket or can be zipped to another bagIf youre hard on sleeping bags youve got nothing to worry about with the Bristlecone MF Westerns microfiber fabric is very water resistant because it is constructed with an extremely high thread count of dense yarns Each microfiber yarn has more filaments than a normal nylon or polyester yarn of equivalent size Woven into high thread count material it becomes a fabric that really keeps wind and water out Since there is no coating or laminate on the material it is highly breathable The fabric construction is responsible for weatherproofness its not something that can wear off wash out or delaminate This is the most technologically advanced nonlaminated weather resistant fabric available Westerns Bristlecone will keep you warm and dry through years of useFeatures and Benefits Extremely breathable yet water resistant Microlite XP shell offers protection from condensation and frost 6 SpacingSide Baffle keeps insulation where it belongs 6948 ShoulderFoot Girth leaves loads of room for bigger folks or more gear Full Down Collar ensures that there are no cold spots Draft Tube seals heat in at the zipper 85 Loft 10 F rating 42 oz Down Fill Just 3 lbs 15 oz total weight Made in the USA

- Bentgate.com


regular long
Weight 4 lb 2 oz / 1870 g 4 lb 6 oz / 1985 g
Fill weight 2 lb 10 oz / 1190 g 2 lb 13 oz / 1275 g
Loft 8 in / 21.5 cm 8 in / 21.5 cm
Temperature rating -10 F / -23 C -10 F / -23 C
Fill 850 fill-power down 850 fill-power down
Shape Semi-rectangular with full collar Semi-rectangular with full collar
Max user height 6 ft / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 69 in / 175 cm 69 in / 175 cm
Hip girth 61 in / 155 cm 61 in / 155 cm
Foot girth 48 in / 122 cm 48 in / 122 cm

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