Western Mountaineering Astralite Down Quilt

-3°C Comfort Limit, 298g of 850+ Fill Power Down (US Method)
Weighs 480g (Regular bag)
Code: SS18439V
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The Astralite Quilts are high performance sleep systems designed for the ultralight fanatic. Compatible with any mummy shaped sleeping pad, they boast high functionality and light weight performance

Western Mountaineering says:

Fans, customers, and dealers alike have been asking us about quilts for years and finally our answer is here: the AstraLite & NanoLite. These quilts are a thru-hikers dream. Constructed with proprietary 7 denier acrylic kiss coated fabric and our world famous 850+ fill down we’ve created products with stellar weight savings . These quilts are capable of attaching to any backpacking sleeping pad using two flat elastic loops for maximum grip. To avoid drafts through the bag, the NanoLite & AstraLite feature a elastic laced bottom closure that can be adjusted to fit multiple widths. Other features include a sewn through footbox and an insulated draft yolk with elastic closure for maximum heat retention.

Because the AstraLite is hoodless, it is important to pack adequate head insulation. AstraLite users should consider bringing a hooded puffy along if temperatures are likely to dip below freezing. The NanoLite is designed for above freezing so a beanie and neck gaiter will do.

This quilt is designed to be used with an insulated sleeping pad. If your sleeping pad is uninsulated or poorly insulated these products will sleep much colder than intended. Make sure to check the R value of your pad to ensure it is adequate for 3 season use.

The AstraLite come in two lengths; the 5’8″ version is design for people at or below 6’0″ tall and the 6’4″ version is design for people between 6’0″ and 6’6″.

Western Mountaineering Astralite Down Quilt is really light, super packable and a great quilt option as an alternative to traditional sleeping bags. Perfect for those lightweight, minimalist adventures.

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/quilts 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

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
  • Insulated draft yolk
  • Elastic lacing bottom closure
  • Flat elastic pad straps for pad attachment
  • 850+ fill power down
  • Made in USA 7d shell fabric/10d liner
  • Shape: Quilt
  • Rating: -3°C / 26° F *
  • Loft: 11cm
  • Highest Quality minimum 850+ fill power goose down


  • Length: 175cm / 5'8"
  • Weight: 480g (excludes stuff sack)
  • Fill weight: 298g


  • Length: 195cm / 6'4"
  • Weight: 524g (excludes stuff sack)
  • Fill weight: 319g

* 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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