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  • Heatseeker™ Eco insulation offers a great warmth-to-weight ratio, is highly compressible and is extremely durable; composed of 30% post-consumer recycled material
  • Zipper zips all the way around the footbox and allows the sleeping bag to be opened up completely for use as a comforter


View all The North Face Men's Sleeping Bags

REI membership


Best Use Camping
Temperature Rating (F) 40 degrees Fahrenheit
Temperature Rating (C) 4 degrees Celsius
Long Right
2 lbs. 12 oz.
Regular Right
2 lbs. 8 oz.
Shell Unavailable
Zipper Location Right
Insulation Type Synthetic
Fill Heatseeker Eco
Fill Weight
Long Right
21 ounces
Regular Right
19.1 ounces
Lining Unavailable
Sleeping Bag Shape Rectangular
Fits Up To (in.)
Long Right
78 inches
Regular Right
72 inches
Shoulder Girth (in.)
Long Right
68 inches
Regular Right
66 inches
Hip Girth (in.)
Long Right
68 inches
Regular Right
66 inches
Stuff Sack Size 10 x 18 inches
Stuff Sack Volume Unavailable
Compressed Volume 10.7 liters
Gender Unisex
Rated 4 out of 5 by from It was all I needed I don't go camping or backpacking in freezing weather. Since I'm more of a warm-weather adventurer, this sleeping bag fulfilled all of my needs. It's lightweight which makes backpacking easier; it's not overly warm which is great during summer camping; and you can zip two of them together!! Most staff members will tell you that you need one left zipping and one right zipping bag in order to join them together, but actually, all you need is two identical sleeping bags in which you can fully unzip them. My husband and I bought two of these and used them on our last backpacking trip. When fully unzipped, you can lie on fully flat and add the second on top and zip them together on both sides utilizing both zippers. I don't think this bag would be the best for colder weather but if what you are looking for is a low-cost bag for warmer adventuring, this is a great light-weight option.
Date published: 2016-07-04
Rated 2 out of 5 by from Too slippery - returned Used this bag for one camping trip. Ended up returning it. I don't always sleep on perfectly level ground and this slippery material just slid downhill on a very slight incline. I slid around inside the bag and the whole bag was in a wad at the foot of the tent with me half in it by morning. Why must every surface of the bag be so slippery? Otherwise it was a nice, light weight but warm enough.
Date published: 2016-06-30
Rated 4 out of 5 by from Love it but.. Bought the regular 1st because that would be the correct size... however the zipper burst in the middle of the night on the 1st use. brought it back and got the Long version which has 2 more inches of girth.. I'm not huge by any means 5"11, 170 but that made all the difference. The only warning I'd give is that the tightening of the strap at the head (pseudo-mummy style) leaves the cords dangling and you can get caught up in them. Otherwise I love it. Got a compression sack to get into my pack.
Date published: 2017-06-19
Rated 5 out of 5 by from Great Basic Sleeping Bag I have been using this pack for a about two years now and have been very impressed with it. It's lightweight and strong enough to take some pulls and awkward catching on surrounding items and packs. The insulation is great for warmer weather and makes a decent pack bag with a compression sack. This pack does exactly what it is supposed to do with no noticeable flaws.
Date published: 2016-09-11
Rated 4 out of 5 by from only choice I had to buy this model because it was the only square sleeping bag available in the store. I wish there had been more options but everything else was mummy style. It would be nice if there other styles available for those who do not care for the mummy style
Date published: 2017-04-13
Rated 5 out of 5 by from Good Choice for Larger Guys (Long Version) I am a big guy with very broad shoulders (6'4" - 240). I sleep on my side. I have hated every mummy bag I've tried, they just aren't big enough to be comfortable for large guys like me. This one fits, and is still light enough to take backpacking. Realistically, I would say mid-50s and above is where this bag is comfortable on its own, when it hits about 50 you will either want to be dressed warmly inside it or want something more. But realize that it can easily be extended into the shoulder seasons with an inexpensive fleece liner and/or a lightweight camping blanket. I combined this with the snugpak jungle blanket for some camping in Maine and it got down to mid-30s and I was perfectly comfortable. Since this thing isn't that heavy to begin with, adding more layers doesn't kill you on weight, and it gives you a lot of flexibility to adjust to the conditions. Although it does not come with one, it can be compressed into a small compression sack, but the instructions warn you not to store it compressed for any length of time. It is an excellent value.
Date published: 2016-05-01
Rated 5 out of 5 by from Great product I bought this bag for lower elevation Sierra summers. It works well for California winters (not in the Sierras!), so it should be fine for summer. It's roomy and comfortable. Good choice.
Date published: 2015-12-05
Rated 4 out of 5 by from Great bag! I picked up this sleeping bag at a great price to take with me on backpacking trips. It's light at 2+ lbs and warm enough for 3 seasons (with adequate layers in chilly mountain temps). On warmer nights I sleep on top of it giving my sleeping pad extra padding. It's not as light/warm as down bags, but it does the trick. And it being a fraction of the price as a down bag, it's also pocket friendly.
Date published: 2015-07-08
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Does this bag come in a compression sack?

Asked by: heirJordan
No, the Dolomite 40 Sleeping Bag does not come with a compression stuff sack. A compression stuff sack of 10" x 18" dimensions or about 20 liters will work:
Answered by: REIservice
Date published: 2017-06-12

The specs say the hip girth is 58 inches.  Is that folded flat (so the circumference would be 116 inches?) or is that the circumference?

Asked by: Katxena
The hip girth is the circumference.
Answered by: REIservice
Date published: 2016-11-21

Can the main zipper be opened from the bottom to ventilate the feet?

Asked by: BayLar
The Dolomite 40 Sleeping Bag does have a two-way zipper so you can keep the bag zipped up at the side and unzipped at the foot.
Answered by: REIservice
Date published: 2017-04-01

According to the Article the The North Face Dolomite 40 Sleeping Bag can be unzipped to make like a comforter. This would be very helpful in cabin hiking in, and rental. Exactly what are the dimensions of the unzipped length,and width?

Asked by: db freestyle
For the regular right bag, the length is 72" and the width is 132".
Answered by: REIservice
Date published: 2017-04-09

What is the inside of this bag made of? Is it comfortable against bare skin in summer heat? 

Asked by: Micah
The lining of this bag is made of a taffeta silk which is comfortable against bare skin.
Answered by: REIservice
Date published: 2017-05-18

Can you zip a Dolmite 40 with a Dolmite 20?

Asked by: Justin
The zipper sizes are the same for both the 20 and the 40 degree bags, so you can unzip both completely to then zip them together as one large bag.
Answered by: REIservice
Date published: 2017-05-17

Is it ok to wash this sleeping bag in our front loading washing machine on gentle cycle? Thanks

Asked by: jamesgreene
It is ok to wash your Dolomite 40 sleeping bag in a front loading washing machine. The following page details care instructions for sleeping bags:
Answered by: REIservice
Date published: 2017-02-10

If I buy two of these would I be able to make it into a double sleeping bag? 

Asked by: Dcorl
It is possible to zip two Dolomite 40 sleeping bags together if you completely unzip each bag, lay one on top of the other, and zip the top bag to the bottom.
Answered by: REIservice
Date published: 2017-06-13
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