Western Mountaineering Puma MF Down Sleeping Bag

-32°C Comfort Limit, 1020g of 850+ Fill Power Down (US Method)
Weighs 1585g (excluding stuff sack)
Code: AW21428
  • £779.99
  • (FREE Delivery on orders over £15)
  • RRP £809.99
Item out of Stock | Usually dispatched within 24 hours

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Western Mountaineering says:

Known by Volcanologists the world over you’d think this Puma MF was filled with high lofting lava! 9.5″ of loft, 36 oz. of 850+ fill power down, two densely packed Interlocking Draft Tubes and a full down filled collar will keep you in the ring of fire till 25 below zero. Its VBlock Side Baffle provides phenomenal down control, so necessary in a bag with this much loft. You get a 64″ shoulder girth so that there’s even room for layering. The MicroLite XP™ shell has superior breathability while being extremely water resistant. This bundle of warmth weighs in at just 3 lb. 7 oz. total weight.

We're working out what we think about Western Mountaineering's Puma MF Down Sleeping Bag, we'll add our comments here in due course.

- Reviewed by Ultralight Outdoor Gear

Help and advice: Choosing a sleeping bag advice
  EN 13537 rating for sleeping bags explained
  Sleeping bag shape and sizes advice
  Sleeping Bag features Page 1
  Sleepin bag features page 2
  All about down filling in sleeping bags
  • 6″ Spacing/V-Block Side Baffle
  • Full Down Collar
  • Interlocking Draft Tubes


  • Length: 180cm / 6"
  • Weight: g (excludes storage bags)
  • Fill weight: 1585g
  • Loft: 24cm
  • Inside Girth: 163/142/99cm
  • Packed size: 25 x 50cm

Rating & Materials

  • Rating: -32°C /-25°F*
  • Shell fabric: 10 denier Liteloft balanced weave nylon w/C-0 DWR
  • Lining: 10 denier Liteloft balanced weave, soft and breathable nylon
  • Fill: 217g (regular bag) Hypoallergenic 850+ fill power goose down
  • Zip: YKK #3 coil zipper (30" length) w/ locking reversible slider

* Western Mountaineering state: 'We independently verify own temperature ratings through our own testing, customer feedback and design knowledge. Most of the items in our catalog we have been making for years, which means we have lots of prior knowledge from everyday consumers on what ratings are accurate. We have also EN tested our bags. In every case the EN rating is lower than our posted rating. This means our ratings are more conservative. We do this to ensure that almost everyone will be happy in our bags at the temperature we publish.'

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