Western Mountaineering UltraLite 20 Degree Sleeping Bag

Western Mountaineering UltraLite 20 Degree Sleeping Bag is rated 4.8214 out of 5 by 28.
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Product Description Item No.   10079729

The Western Mountaineering UltraLite 20 Degree Sleeping Bag is a compressible sleeping bag for moving through various climates during summer bike tours and hiking trips. Sleep in it. Or on it. Who cares, when you're in a different camp each night, this lofty fellow will be by your side. When the temps are low, zip up and tuck into the hood, you'll be toasty warm thanks to the full down collar and draft tube. When you're not off in dreamland, it compresses down into a 7"x13" stuff sack, taking up less space in your saddlebags or backpack and only weighing 1lb 13oz. Wowza!

FEATURES of the Western Mountaineering UltraLite 20 Degree Sleeping Bag

  • Interlocking draft tubes and a full down collar that wraps snugly around your neck to help seal in heat
  • Breathable, water resistant shell protects you (and the down) from condensation
  • 5 1/4" spacing of continuous baffles that encircle the bag from zipper to zipper
  • 16 oz of 850 fill is highly compressible, light weight and toasty warm
  • 5" of loft, rated at 20° F
  • Full-length #5 YKK zipper
  • 59/38" Shoulder/Foot Girth
  • 1 lb 13 oz Total Weight

- + Product Specifications
Hip Circumference (Regular): 52 in., 51 in.
Shoulder Circumference (Long): 60 in., 59 in.
Foot Circumference (Short): 38 in.
Fabric Details: Microfiber
Fill Weight (Regular): 16 oz
Weight: 29 oz
Disclaimer: We only ship this brand to US Addresses.
Max User Height (Long): 6 ft 6 in.
Ultralight: Yes
Max User Height (Short): 5 ft 6 in.
Fill Weight (Long): 17 oz
Fill Weight (Short): 15 oz
Gender: Mens
Features: Ultralight
Best Use: Ultralight Backpacking, Mountaineering and Alpine, Nightcrawling
Exact Temperature Rating: 20 Degrees Fahrenheit
Sleeping Bag Shape: Mummy
Max User Height (Regular): 6 Feet
Bag Weight (Short): 1 lb, 12 oz
Bag Weight (Regular): 1 lb, 13 oz
Bag Weight (Long): 1 lb, 15 oz
Fill Details: 850+ Fill Down
Zipper Side: Right
Insulation: Down

Sleeping Bags Size Comparison Charts

EXtremeLite Series Bags
Model Shape Size Shoulder Girth Hip Girth Foot Girth
MityLite Semi Rectangular 6' 3" 62" 59" 46"
HighLite Mummy Box Stitched 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
SummerLite Mummy 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
Tamarak Semi Rectangular 5' 0" n/a 58" 33"
MegaLite Mummy with Top Collar 5' 6" 63" 56" 39"
6' 0" 64" 55" 39"
6' 6" 65" 56" 39"
UltraLite Mummy with Full Collar 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
AlpinLite Mummy with Full Collar 5' 6" 63" 56" 39"
6' 0" 64" 55" 39"
6' 6" 65" 56" 39"
VersaLite Mummy with Full Collar 5' 6" 62" 53" 39"
6' 0" 62" 53" 39"
6' 6" 63" 54" 39"
Microfiber Series Bags
Model Shape Size Shoulder Girth Hip Girth Foot Girth
Caribou MF Mummy Box Stitched 5' 6" 63" 56" 39"
6' 0" 64" 55" 39"
6' 6" 65" 56" 39"
Alder MF Semi Rectangular 6' 0" 62" 59" 46"
6' 6" 62" 59" 46"
Sycamore MF Semi Rectangular 6' 0" 62" 59" 46"
6' 6" 62" 59" 46"
Ponderosa MF Semi Rectangular 6' 0" 67" 64" 48"
6' 6" 67" 64" 48"
7' 0" 67" 64" 48"
Apache MF Mummy with Full Collar 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 51" 38"
Badger MF Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Antelope MF Mummy with Full Collar 5' 6" 62" 53" 39"
6' 0" 62" 53" 39"
6' 6" 63" 54" 39"
Sequoia MF Semi Rectangular with Full Collar 6' 0" 66" 61" 48"
6' 6" 66" 61" 48"
Kodiak MF Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Bristlecone MF Semi Rectangular with Full Collar 6' 0" 69" 61" 48"
6' 6" 69" 61" 48"
Lynx MF Mummy with Full Collar 5' 6" 61" 54" 39"
6' 0" 62" 54" 39"
6' 6" 63" 55" 39"
Puma MF Mummy with Full Collar 5' 6" 62" 55" 39"
6' 0" 64" 56" 39"
6' 6" 66" 57" 39"
Gore Windstopper Series Bags
Model Shape Size Shoulder Girth Hip Girth Foot Girth
Apache GWS Mummy with Full Collar 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
Badger GWS Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Antelope GWS Mummy with Full Collar 5' 6" 62" 53" 39"
6' 0" 62" 53" 39"
6' 6" 63" 54" 39"
Sequoia GWS Semi Rectangular with Full Collar 6' 0" 66" 61" 48"
6' 6" 66" 61" 48"
Kodiak GWS Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Lynx GWS Mummy with Full Collar 5' 6" 61" 54" 39"
6' 0" 62" 54" 39"
6' 6" 63" 55" 39"
Puma GWS Mummy with Full Collar 5' 6" 62" 55" 39"
6' 0" 64" 56" 39"
6' 6" 66" 57" 39"
Bison GWS Mummy with Full Collar 6' 0" 64" 55" 39"
6' 6" 64" 55" 39"
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Rated 5 out of 5 by from Super Versatile I have used this bag everywhere from the Sierra High Route to stealth camping along highways, and in temperatures ranging from 15 to 75. Two people can benefit from its warmth by doubling it with a thinner bag on the bottom and zipping the two together. This method also allows you to get intimate with your partner, even if it's your bearded best bud. It's not the warmest at 20 degrees, but extra clothes go a long way. The best thing about this bag, being that it's down, is that it breathes so well that I never get hot in it. It's just as comfortable during chilly nights in high elevations as it is on summer nights on the beach.
Date published: 2010-06-28
Rated 5 out of 5 by from An awesome, low-mass bag with only ONE small caveat. To make a bag with such an amazing warmth-to-weight ratio, there had to be compromises, and in this case, it's the durability of the shell and liner fabrics.,,,,If you consciously take good care of it, this bag will last for years. But don't plan on cowboy camping with it, and DO NOT use it without a ground sheet. Be mindful of any hardware on your clothing when you get in, and be careful when zipping it up. Be aware of any sharp objects in your pack that might snag the fabric while you're on the move, too.,,,,Bottom line: this excellent bag works well for most people, but if you're clumsy, careless, or an idiot, you should probably buy something sturdier (like the excellent Marmot Helium).
Date published: 2011-01-24
Rated 5 out of 5 by from Unzips nicely, and feels great to the touch. Packs small, unzips nicely, and feels great to the touch. The collar blocks the air exchange as advertised and is comfortable and unobtrusive. The 6 ft model is plenty long enough for my 5-9 frame. It does tend to follow my body as I roll side to side, so the lesser insulated bottom is exposed. It has not been an issue yet. My WE Ultralite hasn't been tested yet at its rated temperature, but I'm confident carrying it. I generally sleep in a t-shirt and shorts and have only been able to zip it up once this season when it was in the upper 20's. I use an insulated BA brand pad. My old 20 degree bag has been banished to the basement storage as I move toward a lighter and more efficient backpack.. And I'm not looking back...
Date published: 2013-11-20
Rated 5 out of 5 by from Amazing sleeping bag! The Western Mountaineering UltraLite 20 degree down sleeping bag is one of the best available. The bag is very breathable (but still water repelling) and warms you up as soon as you get in (and truly maintains the temperature rating given to the bag).,,,,Not only is the bag super lightweight, but it also compresses to nothing. While the bag comes with a stuff sack, I use the Sea to Summit eVent XS (6L) compression sack, bag's compressed size is 6" x 7" (reg. bag).,,,,Do not let the price of this sleeping bag fool you. For the quality that you get, it is worth every cent. The down is of the highest quality, the sleeping bag is warm, lightweight, durable, and compact... what more can one ask for?
Date published: 2011-12-25
Rated 5 out of 5 by from I have no words Western Mountaineering makes amazing bags and this is another testament to there legendary quality. I was able to use this bag during the late winter trip up in the San Juan's of Washington. The bag worked fantastic, and kept me warm in 25-35 F nights, with no pad. Because I didn't have a pad I lost of body heat to the ground, so I feel it could have handled down into the 15 range with one. Bottom line this bag is simple and effective and well worth the price.
Date published: 2011-04-18
Rated 5 out of 5 by from pure quality This bag is like having a nuclear furnace on me. Tough to use in the summer, it's just too warm zipped all the way up, but great when it's cooler or unzipped and used as a quilt in hot weather. I've slept in it down to low 30's with no problem, but w/ clothes on. The quality is unsurpassed, everything about it feels money. I hesitated dropping a wad on this, but I don't regret it. I can tell this is something I'll have for many years. The shell material is super soft and silky, it's so nice I started using in in my bedroom on cold nights, so comfy!
Date published: 2010-11-08
Rated 5 out of 5 by from Amazing Bag! The best bag ever! This bag rocks!! I bought it for a backpacking adventure in Yosemite. Nights in the low 30's, and I was toasty warm. This is the best down bag I've ever owned. Its amazingly light weight and compressible. The temp rating seems very accurate too. And, just to put things in perspective, I am a wimp when it comes to cold weather...I normally FREEZE in any weather that's not in the 80's.
Date published: 2011-12-19
Rated 5 out of 5 by from One of the best sleeping bags I have used mine for over 8 years.,,I think it's the best sleeping bag for this temp range and for the money.,,Light and warm. Choose the length that just fits your height, and you are not carrying any extra weight. This would make the feet warm up fast too.,,I think they put more dawn near the feet section, so you won't get cold feet when it's cold. It is just an amazing product
Date published: 2011-06-16
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How does this bag compare to the Terralite 25- they seem really similar and I think may weigh the same? I'm looking to drop a few ounces by upgrading from my Marmot Meteor Penguin 15- which is comfy, but more than I often need & weighs about 2lb 7.

Asked by: Terry
Hey Terry, The weights of these bags are very similar. The regular length of the UltraLite 20 is about 1 lb 13 oz and the average weight of the Terralite 25 is 1 lb 8 oz or a claimed weight of 1 lb 13 oz. Besides the temperature ratings these are very similar bags, both designed for 3 season use.
Answered by: Rocko Gigsby
Date published: 2015-09-01

Does 5'6'' fits well for a 5'5'' person? will it feel tight? 

Asked by: brad
Hey there, Thanks for reaching out to us! The Western Mountaineering UltraLite 20 Degree Sleeping Bag 5 ft 6 in should fit you considering your 5 ft 5 in. I'm not sure how you sleep, but it is a mummy-style bag which can sometimes feel a bit constrictive. Sleeping bags keep you warm by trapping your body heat, so you don't want too much extra space. Also, extra space equals more weight in your pack. If you're still undecided, there's the 6 ft bag. I hope this has helped!
Answered by: Rocko Gigsby
Date published: 2016-03-23

Hi, I'm 5,91 ft height which size fits me better regular or long? Regards, Hugo C.

Asked by: hugocaesar
Hey there Hugo, you would want to pick up the Regular length for this item. Regular fits folks up to 6' tall. The Short size fits those up to 5'6" and the Long length fits people up to 6'6". With a sleeping bag, you want to choose one that is long enough to fit you but not TOO long, so you would definitely want to go with Regular and not Long.
Answered by: Rocko Gigsby
Date published: 2016-05-11
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