Western Mountaineering Antelope MF Sleeping Bag

-15°C Comfort Limit, 735g of 850+ Fill Power Down (US Method)
Weighs 1105g (Regular bag)
Code: OC01390V
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When the Sierras or the Rockies are your usual destinations and you need the maximum protection from your 3-season bag leave nothing to chance with our Antelope. Its roomy 62` / 158cm shoulder girth allows for comfort and the 7` loft from 735g / 26 oz of high lofting down provides warmth to minus 15°C.

The security of this bag is sealed with a full 3-Dimensional down filled collar and a robust draft tube.

While extremely weather resistant the MicroLite XP shell retains maximum breathability and its down filled collar is sewn with MicroLite XP fabric. These Antelopes take over in early spring and last through late fall. At a total weight of 1105g they are the most substantial 3-season bag available.

C. Continuous Baffle
D. Full down Collar
Microlite XP Shell
Highest Quality minimum 850+ Fill Down

Western Mountaineering down gear has an awesome reputation in the US and that reputation is beginning to build on this side of the pond. Very high quality materials design and construction results in the lightest bags available for a given warmth.

An example of their attention to detail is their quoted 850+ fill power down used in all their bags: WM quote this figure even though their down generally gets higher ratings in official tests this is because they feel that the official pre-testing preparation enhances the down quality!

Read reviews here:            
Help and advice: Choosing a sleeping bag advice EN 13537 rating for sleeping bags explained All about down filling in sleeping bags
Sleeping bag shape and sizes advice Sleeping Bag features Page 1 Sleepin bag features page 2
  • Continuous Baffle Construction
  • Full Down Collar
  • Microlite XP Shell
  • Full Length Baffled YKK Zipper
  • Shape: Mummy (w/ full collar)
  • Rating: -15°C / 5° F *
  • Loft: 18cm / 7"
  • Highest Quality minimum 850+ fill power down


  • Length: 165cm / 5'6"
  • Weight: 1050g
  • Fill weight: 680g
  • Packed size: 43 x 20cm
  • Internal shoulder girth: 157m / 62"
  • Internal hip girth: 135cm / 53"
  • Internal foot girth: 99cm / 39"


  • Length: 180cm / 6"
  • Weight: 1105g
  • Fill weight: 735g
  • Packed size: 43 x 20cm
  • Internal shoulder girth: 157m / 62"
  • Internal hip girth: 135cm / 53"
  • Internal foot girth: 99cm / 39"


  • Length: 200cm / 6'6"
  • Weight: 1160g
  • Fill weight: 795g
  • Packed size: 43 x 20cm
  • Internal shoulder girth: 160m / 63"
  • Internal hip girth: 137cm / 54"
  • Internal foot girth: 99cm / 39"

* 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.'

Showing our 1 review for Western Mountaineering Antelope MF Sleeping Bag. Write a review ›
Review Summary - 5 out of 5 based on 1 rating.
July 26, 2019 | Simon Miles
Fantastic quality down sleeping bag

I've used plenty of down sleeping bags over the years and the Western Mountaineering bags are up there with the very best of them. Materials and construction, as you would expect at this price point, are first rate. But what really sets these bags apart is the quality of the down, which provides exceptional loft and phenomenal insulation for the size/weight of the bag. And if, like me, you're not six foot tall, you'll really appreciate being able to buy a bag that's the right length for a change. Not cheap, but you get what you pay for. Highly recommended.

Ultralight Outdoor Gear Limited