Western Mountaineering

Western Mountaineering Ultralite 20 Degree Down Sleeping Bag

5.0(10)
$650.10
sizeS

429+ bought in the past month

About this item

  • [face fabric] ExtremeLite
  • Made in USA
  • 20° F temperature rating and 5IN loft
  • Made with very breathable and weather resistant 20 denier shell fabric and filled with 16 ounces of 850 plus fill power goose down
  • Full-length #5 YKK zipper with an insulated draft tube and a full down collar to keep the warmth in
  • 5 1/4IN spacing/continuous baffles which encircle the bag from zipper to zipper and allow you to shift the down insulation to fit your ideal temperature
  • 1 lbs. 13 oz. total weight and 59IN/38IN shoulder/foot Girth
$650.10

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Product details
BrandWestern Mountaineering
ColorRoyal Blue
Occupancy1 Person
ShapeMummy
SeasonsSummer
Temperature Rating20° F
Age Range (Description)Adult
SportMountaineering
Materialgoose-down
Fill MaterialDown
Technical specifications
brandWestern Mountaineering
colorRoyal Blue
occupancy1 Person
shapeMummy
seasonsSummer
temperature_rating20° F
age_range_descriptionAdult
sportMountaineering
materialgoose-down
fill_materialDown
product_dimensions13"L x 7"W
closure_typeZipper
item_weight2 Pounds
outer_materialtaffeta
fabric_type[face fabric] ExtremeLite, [lining] nylon taffeta
size6ft/Left Zip
maximum_height_recommendation6 Feet
upc813735020935
global_trade_identification_number00813735020935
thermal_resistance20 Watts per Meter per Degree Celsius
item_package_dimensions_l_x_w_x_h12.5 x 11.2 x 10.7 inches
package_weight1.25 Kilograms
item_dimensions_lxwxh29 x 12 x 10 inches
brand_nameWestern Mountaineering
warranty_descriptionLimited Warranty
model_name60ULTRLZ
suggested_usersmens
number_of_items1
manufacturerWestern Mountaineering
part_number60ULTRLZ
styleMummy
fill_material_typeDown
hand_orientationLeft
best_sellers_rank#508,858 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #847 in Camping Sleeping Bags
date_first_availableOctober 27, 2015

Product videos

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Customer reviews

5.010 ratings
  1. 5100%
  2. 40%
  3. 30%
  4. 20%
  5. 10%
★★★★★

A good long term investment

SimisimiJuly 11, 2025

I’ve had my bag for over 15 years and it’s been used hundreds of times. When my son borrowed it last spring he damaged the zipper. I sent it into Western for repair. They replaced the zipper at no charge and shipped it back good as new! This bag is the lightest bag I own but with a pair of thermal underwear and a hat you can use it down to 20 degrees and lower without any concern. Durable, compact, light and warm. An investment worth making. Read more

★★★★★

Best bag in its category

Nathan MurrayNovember 25, 2023

I spent a lot of time researching bags before I bought this. I needed a bag I could use in early summer in the Rockies that was lightweight and durable. So far so good! If you take a stuff sack that can compress it you can get it down to something the size of a cantaloupe and it will definitely keep you warm down to about 20 degrees. Highly recommend bags from WM, I have several more and plan on buying another as soon as I can afford to cry a little when the charge hits my card Read more

★★★★★

Best bag on the market!

Jesus is KingJune 21, 2021

I bought this bag 15 years ago and use it almost daily. This bag is phenomenal. The only negative is the price, but like the old adage goes: You get what you pay for! Don't let the price sway you to a different more inferior bag. This bag on Amazon is almost $200 more than what I paid for it 15 years ago, so this is definitely an investment. I've used this bag in below 20 degree weather and it's still super warm and cozy without any drafts cutting through. At first I wasn't nuts about the mummy style, but when it's cold outside it is so worth the tighter fit. Being 6 foot tall I opted for the 6'6" option. That extra 6" is definitely handy because I hate feeling my feet being squeezed. I even use my bag in my house if it's colder than usual outside. I love that it's American made, and Western Mountaineering will refill your bag with down if needed. I'm about to have them do that to this bag. I love how lightweight this bag is. That was my main motive for buying this in the first place. I've gone on several extended backcountry backpack trips, and every ounce counts. If you spill something on your bag, the shell wicks the liquid off immediately and it's easy to wipe clean. I rarely keep it stuffed in its packing pouch unless I'm packing it. I immediately put it in the big bag that comes with it to keep it from being compressed. I hope this review helps someone make the choice to buy a Western Mountaineering bag. They are truly top notch and I don't regret the investment I made 15 years ago. If you take care of it, it will take care of you. Jesus is King! Read more

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