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Therm-a-Rest
Polar Ranger Sleeping Bag: -20F Down

4.375 out of 5 stars
16 Reviews

Out of Stock

Don't worry though, we have a lot more -40 to 4 Degree Down Sleeping Bags in stock than that.

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A bear of a bag.

Whether you're using your campsite as a basecamp for alpine touring or backpacking through a winter wonderland, the nights get cold. Sleep in the Therm-a-Rest Polar Ranger -20 Degree Down Sleeping Bag for a cozy refuge when you're ready to get off of your feet. The 800-fill down lofts when you pull it out of its compression sack, and the Nikwax treatment helps it resist compressing when you expose it to moisture. Features like the side vents that allow you to use your hands and the synthetic-filled snorkel hood that keeps your face warm without trapping in the moisture from your breath optimize this bag for extreme conditions—whether you're riding them out while sleeping or enjoying a sunrise drink.


Details

  • Sleeping bag for backpacking in cold conditions
  • 800-fill down lofts to maximize warmth retention
  • Nikwax treatment resists moisture-based compression
  • Synthetic-filled, snorkel hood manages frost from breath
  • Side vents open to allow arm use or airflow
  • Draft tubes block gusts from all the zippers
  • Toe-asis adds extra insulation to warm your feet
  • Item #CAS00DO
Material
[face fabric] 20D polyester ripstop, DWR, [lining] ThermaCapture (20D polyester taffeta)
Insulation
800-fill goose Nikwax Hydrophobic down
Shape
mummy
Zipper
center
Max User Height
[regular] 72in, [long] 78in
Shoulder Circumference
[regular] 62in, [long] 65in
Hip Circumference
[regular] 57in, [long] 58in
Foot Circumference
[regular] 46in, [long] 51in
Bag Length
[regular] 80in, [long] 85in
Pockets
Toe-asis foot warmer
Pad Retainer
Synergylink
Venting
2 zippered side
Fill Weight
[regular] 2lb 2oz, [long] 2lb 4oz
Degree
-20F
Storage Sack
included
Stuff Sack
included
Stuff Size
11 x 20in
Claimed Weight
[regular] 3lb 3oz, [long] 3lb 7oz
Manufacturer Warranty
lifetime

Overall Rating

4.5 based on 16 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 3 reviews
5 Stars - 11 reviews

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5 out of 5 stars

March 1, 2023

Incredible bag, terrible sizing

First off these bags are incredibly well designed and comfortable. I recently had an unplanned night outdoors in the snow in 14° weather with -2° wind chill. I slept on a tarp on top of snow with a thermarest pad and this bag inside a goretex bivy sack and I was quite comfortable temperature wise with one of the side vents open. However, the sizing is crazy. I'm 5'11" and initially bought the bag rated for someone up to 6' and it was way too small. You have to wedge yourself inside and I felt pressure on the top of my head from the bag and having the bag over your head means your face down to your mouth is tightly covered and claustrophobic. The large bag which I believe is considered appropriate for somebody up to 6'4" was comfortably sized for me. Bottom line, this is an incredible product that will keep you warm in bad conditions but the sizing is deceptive.

Matt
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

4 out of 5 stars

January 19, 2023

Great Sleeping Bag

Love this bag but the stuff sack is toooooooo small needs to be atleast 4" bigger in dia. My hads hurt from trying to get in the stuff sack!!!!

Bob C.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

December 10, 2022

Warmest bag ever

Could be a little wider glad I'm fit but now -0 degree nights in my van are a breeze

Terry B.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

2 out of 5 stars

November 2, 2022

Looking to buy..........

Hoping to purchase this item as it seems to have many of the features I am interested in for a bag of this caliber. However, I have some unanswered questions. Have reached out to customer service via their portal twice in past 2 months and they have been non-responsive. There is no phone # that is available either. Raises significant concerns on potential handling for future issues if customer service is ever needed.

CF
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

September 30, 2022

My favourite sleeping bag

I had this sleeping bag on Denali expedition and everybody was jealous about it. It kept me warm even in -35C and when it got wet it dried fast. The only thing that concerns me is that feather on the back where I sleep starts to disappear, it probably moves, what can I do about it?

Silvia
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

1 out of 5 stars

June 24, 2022

Compression sack to small to fit the bag inside.

So the sleeping bag is nice, however there are number of places where threads are left lose. However, the compression sack is too small by at least 4 inches in circumference. I am using air pump sack to store the bag for now. For that price the compression sack should be perfect. I dont know what Im gonna do, I will propobly purchase fabric and plastics and have a custom made commpression sack, but honestly, I am very dissatisfied and disappointed. If you plan to purchase this bag be prepare to spend extra for compression sack.

Kris P.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

April 17, 2022

Great all around cold weather bag

I've now used this for one season of winter camping and can report that it's a great piece of gear! I've taken it on winter camping trips where temperatures dropped down to -30C,-25C, and -12C. The bag performed really well under all of those conditions. The side vents worked wonders in the cold temperatures when I wanted to grab something but didn't want to expose my whole body to the cold outside temperatures. I don't winter camp as much as I summer camp (type 2 fun is a one off...not a regular event like spring/summer/fall camping :p) so I'm excited to continue trying this out in future seasons. Highly recommend!

Stephanie W.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

April 10, 2022

Fit like glove , I

Fit like glove , I can wait go north and use it , very nice

user image
Ales C.
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

March 10, 2021

Very warm, fit is slim, it was 0 deg and did very well!

You can't go wrong with this bag for a very light but warm bag. Used in CO at 9000' and it was 0 deg, held up very well. Little tight in the shoulders, but I will continue to use it for sure. Expensive but worth it!

Shooter
a Cascade Designs brand site

Originally reviewed on a Cascade Designs brand site

5 out of 5 stars

October 5, 2020

Super warm, fluffy sleeping bag!

Familiarity:
I've used it once or twice and have initial impressions

I am a very cold sleeper and was looking for a bag to keep me warm in cold conditions. This bag might sound extreme because it is for -20 F, but for me, it kept be very comfortable at 32 F. Generally, for cold sleepers, it is best to add 20 degrees to a lower rating temp rating to get an idea of what is the lower limit of comfort. I used this recently on a trip to Bryce, and the nights can be very cold. I wore a thin long sleeved shirt and long pants and socks and slept in this bag. Fully zipped, it was very hot for sleeping at 32 degrees, but it is easy to adjust the temp by venting the zippers on the sides and opening the snorkel. The bag is really long for me at 5' 4", and also very wide since this is a unisex bag that is also meant to fit men. But, the roominess worked out because i like to toss and turn while i sleep and i had room to sleep on my sides. In terms of weight and compression, it weighs about 3 lbs and can compress to the size a little bigger than a soccer ball. It isnt the most compact bag or the lightest, it is definitely warm and i see myself using this on many trips in the future!

Sarah H
Backcountry.com

Originally reviewed on Backcountry.com