Western Mountaineering Antelope MF Sleeping Bag

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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.

Western Mountaineering says

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″ shoulder girth allows for comfort and the 7″ loft from 26 ounces of high lofting down provides warmth to 5°. 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 2 lbs. 7 oz., they are the most substantial 3-season bag available. They are also available in 5’6″ length.

Our Verdict

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!

– Reviewed by Ultralight Outdoor Gear

Features

• Continuous Baffle Construction
• Full Down Collar
• Microlite XP Shell
• Full Length Baffled YKK Zipper

Specifications

• Shape: Mummy (w/ full collar)
• Rating: -15°C / 5° F *
• Loft: 18cm / 7″
• Highest Quality minimum 850+ fill power down

Short

• Length: 165cm / 5’6″
• Weight: 1050g (WM stated weight)
• Fill weight: 680g
• Packed size: 43 x 20cm
• Internal shoulder girth: 157m / 62″
• Internal hip girth: 135cm / 53″
• Internal foot girth: 99cm / 39″

Regular

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

Long

• Length: 200cm / 6’6″
• Weight: 1160g (WM stated weight)
• 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.’

More About Western Mountaineering:

• Western Mountaineering Construction
• Western Mountaineering Materials

Help and advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• The EN13537 Standard
• All About Down