Western Mountaineering AlpinLite

3 reviews
5-star:   1
4-star:   2
3-star:   0
2-star:   0
1-star:   0


short regular long
Weight 1 lb 13 oz / 878 g 1 lb 15 oz / 880 g 2 lb 1 oz / 935 g
Fill weight 1 1b 1 oz / 480 g 1 lb 3 oz / 535 g 1 lb 5 oz / 595 g
Loft 5 in / 12.5 cm 5 in / 12.5 cm 5 in / 12.5 cm
Temperature rating 20 F / -7 C 20 F / -7 C 20 F / -7 C
Fill 850 fill-power down 850 fill-power down 850 fill-power down
Shape Mummy Mummy Mummy
Max user height 5 ft 6 in / 165 cm 6 ft 0 in / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 63 in / 160 cm 64 in / 163 cm 65 in / 165 cm
Hip girth 56 in / 142 cm 55 in / 140 cm 56 in / 142 cm
Foot girth 39 in / 99 cm 39 in / 99 cm 39 in / 99 cm



This bag works great as a 3-season bag here in Northern…

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: $300?


This bag works great as a 3-season bag here in Northern MI, and the 20° rating is the REAL thing!


  • True to rated temperature
  • Generous shoulders
  • Light weight
  • Ultra-packable


  • When drawn tight, the strings around the hood hang in your face
  • No pocket

I camp every month of the year, both on my own and with the Boy Scouts. I have used this sleeping bag, primarily in Northern Michigan, for the past 3 years.

It works great as a 3-season bag here, and the 20° rating is a REAL rating when used with a quality ground pad.  I have been in the low 20s several times without noticing any cold spots, and is easily vented when the temperatures soar into the 70s. 

The shoulders and footbox are generous, by mummy standards, and the draft tubes are well placed.  There is very little down "bleed", and it is fairly easy to pull the occasional feather poking through back into the bag.  The nylon is lightweight but not nearly as fragile as others I have seen. 

Opposing full length zippers make venting as well as getting in and out easy.  I am 5'10" tall, and use the 6'0" bag.


This is a premium down sleeping bag. It is a mummy…

Rating: rated 4.5 of 5 stars
Source: tested or reviewed it for the manufacturer (Return)


This is a premium down sleeping bag. It is a mummy style, but it is a "wide mummy," which I like. It is also very warm, yet light weight. See my video review below for full details on this bag... it's a good one!


  • light weight
  • warmth


  • down bags won't work well if wet


I love this bag. I've used it in the damp Southeast…

Rating: rated 4 of 5 stars
Design: mummy
Fill: down
Temperature Rating: 20 degrees
Weight: 2 pounds 2 ounces (6' 6" model)
Price Paid: $425

I love this bag. I've used it in the damp Southeast during fall and most of winter for over two years.

It is conservatively rated, lightweight, packs small, breathes well, and dries quickly. This bag is rated for 20* and will go a little below that for me- an average sleeper.

The bag has continuous baffles, plenty of down for the rating, the baffles loft well and hold the down in position, the zipper and down collar work very well. The zipper is almost full length, the hood closes well - so tightening it up in the cold or opening it for warmer nights is good to go.

The fabric and price are the only downsides. If you really want to shave ounces the fabric is a good trade off, but if you want your investment to last a long time this fabric needs to be treated gently.

The cost - well I think it is overpriced for what it is- but the market bears the price so I had no choice but to pay the big bucks for it. The score of 4 is based on the price - otherwise it would have gotten a 5.

I would recommend it. It is expensive, but it is the best bag I have ever owned in thirty some odd years.

Where to Buy

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Manufacturer's Description

Visit Western Mountaineering's AlpinLite page.

Retailers' Descriptions

Here's what other sites are saying:

The Western Mountaineering AlpinLite Sleeping Bag is wide, warm, and packed with features. With a 3-dimensional full down collar, a full-length YKK zipper, and 5 inches of loft, the Alpinlite has quickly become a popular model. The award winning Ultralite has been a favorite among lightweight backpackers for more than a decade, and the Alpinlite is just a wider version of that great bag. There are many 20 degree down mummy bags on the market, but none have the width, warmth, or loft of this bag.

- CampSaver.com

The Western Mountaineering AlpinLite offers all the features of the award-winning UltraLite with a more spacious interior. Don't settle for discomfort, five extra inches allows blissful repose with little penalty to the bag's overall weight. You'll find the AlpinLite stands alone. ExtremeLite(TM) ripstop nylon, sourced for its high thread count, weighs just 0.9 oz (26 g) per square foot and offers exceptional compressibility Enjoy easy ventilation with a full-length #5 YKK Coil Zipper featuring two locking slider pulls for convenient access from both inside and outside Dacron(R) stiffening tape ensures smooth zipping and prevents snags Insulated draft tube keeps heat from escaping through the zipper Top collar extends from the from the zipper across the neck to keep warm air from escaping through through the neck 5 in (12.7 cm) loft offers luxurious warmth and high compressibility 5.25 in (13.34 cm) spaced baffles allow maximum loft while preventing down migration Continuous baffles encircle the bag zipper to zipper allowing down manipulation for comfort in broad temperature ranges DWR finish keeps moisture at bay even after multiple washings 64/39 in (162.56/99.06 cm) shoulder/foot girth Stuff sack and large volume storage sack included Proudly made in the USA

- OMCgear

Climbing or traversing technical pitches with a massive load dangling behind you is a bad way to go through life. Western Mountaineering created the Alpinlite 20-Degree Down Sleeping Bag for alpine climbers and weight-obsessed backpackers who demand top-shelf quality and bottom-line weight savings. Though it packs the warmth of 850-fill goose down and a full draft collar, the Alpinlite 20 weighs in at just over a pound.

- Backcountry.com

Wide, warm, and packed with features, it's no wonder the Western Mountaineering Alpinlite has been the bag of choice with lightweight hikers for over a decade.