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  • Water-resistant 600-fill duck down compresses small and excels in wet conditions
  • Long side unzips into a quilt
  • Short side-zip works as both a vent and armhole
  • Roomy mummy shape won't cramp your sleeping style
  • Differentiated draw cords (one round, one flat) let you adjust the hood and neck easily in the dark
  • Durable water repellent finish on the polyester shell resists moisture and stains
  • Included stuff sack compresses for packing; mesh expansion allows breathable storage


View all REI Co-op Men's Sleeping Bags

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Best Use Camping
Temperature Rating (F) 45 degrees Fahrenheit
Temperature Rating (C) 7.2 degrees Celsius
1 lb. 11 oz.
1 lb. 9.5 oz.
Shell 40-denier ripstop polyester
Zipper Location Right
Insulation Type Down
Water-Resistant Down Yes
Fill 600-fill water-resistant duck down
Fill Weight 9.2 ounces
Lining Brushed polyester
Sleeping Bag Shape Semirectangular
Fits Up To (in.)
78 inches
72 inches
Shoulder Girth (in.) 62 inches
Hip Girth (in.) 56 inches
Stuff Sack Size
7 x 8.5 inches
6.5 x 8.5 inches
Stuff Sack Volume
3.5 liters
3.2 liters
Compressed Volume
5.2 liters
3.13 liters
Gender Unisex
Rated 5 out of 5 by from The REI Snuggie I purchased this bag primarily as a liner. I recently completed a 4 day trip in the White Cloud Mountains in Idaho. I took it with me just in case my 30 degree BA Fish Hawk was not warm enough. I am glad I did. I am nearly 6 feet tall, 185 pounds with broad shoulders and I fit just fine. My most favorite thing about this bag is the ability it has to convert into a snuggie of sorts. I loved wearing it around camp in the morning while the temps were still chilly. The only thing that could make this better is if some type of attachment at the bottom to hold the foot box up while you are walking around camp so it does not drag on the ground.
Date published: 2016-08-22
Rated 5 out of 5 by from I love this bag I bought this bag for desert camping but I've found it to be really nice for a much wider variety of camping. This winter I went out winter backpacking in Yellowstone and used it as a liner bag inside my 0 degree bag in -10 degree weather in the Gallatin range. I've regularly used it for temps from the high 20's and above because I use a sea to summit sleeping bag liner to add a couple degrees. For the price you can't go wrong. Also if you get a small compression sack you can compress it to roughly the size of a 1L cooking pot.
Date published: 2016-04-23
Rated 3 out of 5 by from Not warm enough, and hard to get in and out of. So... this bag is rated for 45°. If you're going to be comfortable, you'll need to stay well above that temperature--perhaps 55° to 65°. Plan on having to augment this bag with liners or extra clothing. Also, the zippers are only so-so. If you've got to get up and relieve yourself at night, be prepared for a struggle as you try to free yourself from this bag. They don't move very well and they're prone to snagging. Finally, I personally could use some more room in the bag. At 6' and 215 lbs, I can't lie on my back on lay my arms at my sides comfortably. It's a good bag, but not a great bag.
Date published: 2016-11-12
Rated 3 out of 5 by from Room for improvement This bag has lots of potential to fit the niche of a lightweight, fair-weather bag. Unfortunately, it falls short in my opinion. First, there is no EN temperature rating. Of course EN ratings are not perfect, but they at least represent a standardized rating system. I've slept in other bags with EN ratings and found them to generally be true to the rating. This bag has an non-standardized rating of 45*F. I slept in it one night with a low temperature of 47*F. I wore fleece tops and bottoms, socks, and was on a Klymit Insulated Static V (R rating of 4.4). I was very cold much of the night. Not cold enough to be dangerous, but cold enough where I was uncomfortable and had difficulty sleeping. I would say this is realistically a 50-55*F bag. Second, the zippers are very small and catch frequently. It is very difficult to zip or unzip this bag if the zipper chains are not exactly parallel to each other. Even then, the zipper still frequently catches on itself. If REI added a more substantial zipper and a couple extra ounces of down fill this could be an excellent 45*F bag. On the bright side, this bag looks great and compresses well. It is also very lightweight. In sum, I ended up returning this bag and buying a North Face Fury 35 instead.
Date published: 2016-04-12
Rated 5 out of 5 by from Spring and Summer Use My low temperature bags are simply too warm for the temperate spring and summer backpacking I do. Used my new Helio 45 bag for a one-night check-out backpack with temp. down to 45 and was comfortable wearing thermals. Plan to rely on augmenting with down jacket for unusually cold spring and summer nights. Lower weight and compact size compared to other bags are great. Can't comment on durability yet. Looking forward to more comfortable sleeping.
Date published: 2016-04-18
Rated 5 out of 5 by from a great bag! I LOVE it! I bought this and went backpacking and slept in a hammock for two nights. The forecast up until we left was 46 degrees for both nights. The first night was mid 40's and i did fine except my feet got a little cool...not unusual for me. Second night it dipped into the upper 30's!!! I wasn't expecting that. I had to supplement heat with a warm water bottle to keep my feet warm. But the rest of my body stayed just warm enough. This bag has a very well thought out design, the same bag that comes with it has an oversize portion that is mesh that allows it to remain fluffed. Then you can compress it into the small silnylon part of the bag and drawstring it for a very small pack about the size of a nalgene bottle...maybe slightly larger. LOVE LOVE LOVE this little affordable bag! I think it met the temperature rating dead on. It is small enough to use as a liner in my larger Nemo 15 so should be able to combine those for a zero degree temperature.
Date published: 2016-05-20
Rated 4 out of 5 by from Is as advertised Good value. Meets specs. Took out for trial, and not sufficient for anything under 45 degrees. Above that, works fine.
Date published: 2016-08-08
Rated 5 out of 5 by from Really like this for summer. I've used this sleeping bag for a week and a half straight, and have no complaints. I've used it quilt style, and mummy. I've gotten it wet, and it still stays warm. I live in Tennessee, so the lows are consistently around 60 right now, and the bag gets more than warm enough. It's really light weight, and packs down to the size of a double nest eno. I love it.
Date published: 2017-06-04
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Why is this bag not recommended for backpacking, seeing as it is so lightweight?

Asked by: AnaMaria
AnaMaria, It really depends where you plan to camp and how hot you sleep. My backpacking is mainly done in California so even though it maybe 85 in the day it can drop into the 30's at night which means most backpackers opt for a 20 or 30 degree bag. If you are confident night time temperatures will be more moderate this would be a great bag, especially if you are prepared to where some extra clothes on those chilly nights. Personally I sleep hot so I usually go with a lighter sleeping bag and pack a down jacket that I can open up an put on top of my sleeping bag if I need some extra warmth.
Answered by: Bilko
Date published: 2017-06-20

How much does weigh

Asked by: Crazy Horse
The regular bag weighs 1 pound 9.5 ounces. The long bag weighs 1 pound 11 ounces. The weights are listed under the specs tab.
Answered by: REIservice
Date published: 2017-04-06

Can this be zipped together with an REI Trail pod bag to make a double? If not, what could it be paired with?

Asked by: Corey H
The Helio Down 45 Sleeping Bag cannot be zipped into the Trial Pod 29. The zipper on the Helio Down zips all the way around the footbox of the sleeping bag.
Answered by: REIservice
Date published: 2017-05-22

If I am 5' 11 3/4" 185 should I get the long? Or is the regular roomy enough to accommodate me 

Asked by: JoshuaN
The regular length Helio Down 45 Sleeping Bag is fine for someone up to 6' tall.
Answered by: REIservice
Date published: 2016-08-18

what is the best way to wash this bag?

Asked by: Rachel62
Check out our Expert Advice article on sleeping bag care:
Answered by: REIservice
Date published: 2017-06-08

Are there specific demensions available for this bag? Length, width, at the head and foot box. I'm curious if the bag will fit inside my SOL Thermal Bivvy. 

Asked by: Jmcourt
​The sleeping bag measures 21" wide at foot, 24" wide at the head and 31" wide at the shoulder. The regular sleeping bag is 72" long and the long version is 78" long.
Answered by: REIservice
Date published: 2017-05-22

Can two of these bags be zipped together to form a dual sleeping bag?

Asked by: Steve 825
You cannot zip two of these bags together due to the configuration of the zipper and sleeping bag. The zippers are compatible, but once the bags are zipped together the hoods of the sleeping bags will not be oriented correctly or comfortably.
Answered by: REIservice
Date published: 2016-08-08

It would be good,and great if REI went into detail about the availability and detail of a Triple Bag Design.

Asked by: db freestyle
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