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Learn MoreWestern 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.
Material
MicroLite XP (polyester microfiber)Insulation
850+ fill downShape
semi-rectangularZipper
full-length, dual-designMax User Height
6ft, 6ft 6inShoulder Circumference
69inHip Circumference
61inFoot Circumference
48inBag Length
6ft, 6ft 6inDraft Tube
insulatedPockets
nonePad Retainer
noneFill Weight
[6ft] 2lb 10oz, [6ft 6in] 2lb 13ozDegree
-10FStorage Sack
large volumeStuff Sack
urethane coatedStuff Size
10 x 20inClaimed Weight
[6ft] 3lb 15oz, [6ft 6in] 4lb 3ozManufacturer Warranty
lifetimeActivity
winter camping