How to Choose Sleeping Bags for Backpacking
Marmot NanoWave 45 Sleeping Bag - Men's
$89.00 – to $99.00
When space and weight are at a premium on biking trips, kayaking adventures and backpacking treks, the Marmot NanoWave 45 sleeping bag easily stuffs into a pannier, stern compartment or pack.
Key Details
Fill
Spirafil
Weight
Regular - Left Zip: 1 lb. 13 oz.
Long - Left Zip: 2 lbs.
Compressed Volume
Regular - Left Zip: 5.01 liters
Long - Left Zip: 5.6 liters
Temperature Rating (F)
49 degrees (F)
- Lightweight mummy design, blanket construction and synthetic Spirafil high-loft insulation trap warmth even when wet, keeping you cozy down to temperatures around 45°F
- Full-length YKK® zipper with 2-way sliders wraps around the footbox for easy ventilation; snagless draft tube helps prevent air from sneaking in and fabric from catching
- "Feely" drawcords let you make adjustments in the dark
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Marmot Backpacking Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 49 degrees (F) - EN |
| Tested Comfort | 56 degrees (F) - EN |
| Temperature Rating (F) | 49 degrees (F) |
| Temperature Rating (C) | 9 degrees (C) |
| Weight | Regular - Left Zip: 1 lb. 13 oz. Long - Left Zip: 2 lbs. |
| Ultralight | Regular - Left Zip: Yes |
| Shell | Polyester |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | Spirafil |
| Fill Weight | Regular - Left Zip: 13.9 ounces Long - Left Zip: 15.8 ounces |
| Lining | Polyester |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular - Left Zip: 72 inches Long - Left Zip: 78 inches |
| Shoulder Girth (in.) | Regular - Left Zip: 60 inches Long - Left Zip: 62 inches |
| Hip Girth (in.) | Regular - Left Zip: 58 inches Long - Left Zip: 60 inches |
| Stuff Sack Size | Unavailable |
| Stuff Sack Volume | Unavailable |
| Compressed Volume | Regular - Left Zip: 5.01 liters Long - Left Zip: 5.6 liters |
| Gender | Men's |
Buying Advice
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Most Helpful Favorable Review
Warmer than I expected
ruffrey6 years ago
On a 48 degree F night, on a neo air xlite with a double wall tent, I was way too warm in this bag and slept with it open and leg/arm hanging out. It could have gone down to 40 no problem. Performed well in high condensation. Male 5'8" 165lbs, the regular is a nice fit. Excellent balance of price, weight, and warmth.
ruffrey
Sacramento, CA
13 people found this review helpful
Most Helpful Critical Review
disappointed
mab114 years ago
Bought 2 of the regular sized bags for the weight and acceptable temp rating for warmer pack trips. I was disappointed that the weight of the bags alone were more than 1/4 pound heavier than stated. Additionally, although Marmot insinuates that this bag is rated to 45 degrees by name, it is only rated to 49, so really its a marmot 50. On the trail, with lows in the low 50s, my wife was cold in hers, and I was on the edge. Not surprising, this is a very thin bag. Returned them and bought sierra designs 35 degree bag for about the same price, and only 2oz more than the marmot. Very happy with the new bag, much warmer and better features. The marmot bag did not meet marmots usual standards.
mab11
CA
8 people found this review helpful
Customer Images
JScottyG
Carlisle, PA
Versatile, packs small, good mild-weather bag
3 years ago
I got these for both my son and me, as I was looking for a lightweight backpacking option - my wife is allergic to down so we don't have anything but synthetics in the house, and these fit the bill nicely. This is a good summer-weight bag and packs very small for a synthetic bag. I was even comfortable tarp-camping down into the low thirties when I combined this bag with an insulated sleeping pad, fleece liner, sleeping cap, proper layering, etc. (I sleep fairly warm). This bag is great for mid-spring to mid-fall in south central PA, and I have a couple of different weights of bag liners to make for a flexible backpacking sleep system.
Age:45–54
Weight:150–175 lbs.
Height:5'11"
Yes , I recommend this product
Dr8ew
Ohio
Nice lightweight summer bag
5 years ago
Perfect lightweight summer sleeping bag. Fits compactly in my pack, doesn't take up much room at all. Only issue is the weight listed at 1lb 1.3oz but even the outside of the compression sack has it at 1lb 13oz. On top of that, I weighed it at home with the compression sack and it's 2lb 4oz. So misleading info on the site for sure.
Yes , I recommend this product
Originally posted on marmot.com
ruffrey
Sacramento, CA
Warmer than I expected
6 years ago
On a 48 degree F night, on a neo air xlite with a double wall tent, I was way too warm in this bag and slept with it open and leg/arm hanging out. It could have gone down to 40 no problem. Performed well in high condensation. Male 5'8" 165lbs, the regular is a nice fit. Excellent balance of price, weight, and warmth.
Yes , I recommend this product
mab11
california
disappointed
4 years ago
Bought 2 of the regular sized bags for the weight and acceptable temp rating for warmer pack trips. I was disappointed that the weight of the bags alone were more than 1/4 pound heavier than stated. Additionally, although Marmot insinuates that this bag is rated to 45 degrees by name, it is only rated to 49, so really its a marmot 50. On the trail, with lows in the low 50s, my wife was cold in hers, and I was on the edge. Not surprising, this is a very thin bag. Returned them and bought sierra designs 35 degree bag for about the same price, and only 2oz more than the marmot. Very happy with the new bag, much warmer and better features. The marmot bag did not meet marmots usual standards.
No, I do not recommend this product
MIke
Western North Carolina
Versatile Bag
1 month ago
Has worked historically for my son over a wide range of climates. For its versatility, I find the measured weight of 2 lb 4oz and compact compression a blessing. I got this bag in 2017 for my son when he started Boy Scouts. it has performed well for him through 2024 in just about every climate, down to near-freezing in the NC mountains and Philmont in New Mexico. And he only uses a non-insulated Klymit inflatable sleeping pad. It performs if it gets moist. I got one this year for myself for our more moderate temp spring backpacking. I used to use a North Face Wasatch 55 but this left me chilly at 55-60°. The Nano 45 works great for me in the 45-60° range. It is somewhat snug at the shoulders for this 200 lb dad but fits my 5-9 170 pound son perfectly. With a nice Sea to Summit bag liner, I would expect this to perform well below 40° even for me. It has been sturdy and held up to 7+ years of harsh backcountry scouting treatment!
Age:55–64
Weight:175–200 lbs.
Height:5'8"
Yes , I recommend this product
LifealaCarte
Los Angeles
Lasted the test of time
4 years ago
[This review was collected as part of a promotion.] Very happy with this sleeping bag for warm evenings that extend into chilly nights - spring, fall and high elevation summer camping. I took this summer backpacking though Alaska and it packs down in it’s cinch sack and is lightweight. When I used the conch sack as a daypack in town, one of the outfitters said he had the same one and did the same thing with it (used as daypack). Great minds think alike. Super comfortable and love the material. Not a sweaty layer of plastic at all. Machine washes great.
Yes , I recommend this product
Originally posted on marmot.com
Crash7034
Chattanooga
Great light weight sleeping bag
5 years ago
Used on a overnight last weekend. Weather was cold and damp, but I was warm and toasty in the bag. Temps got do wes n into the upper 30's
Yes , I recommend this product
Black93Z28
Bowling Green, KY
Great, light weight bag!
5 years ago
[This review was collected as part of a promotion.] My family has had three of these light weight Marmot Nanowave 45 bags for years, and they have never disappointed us. We have used them on backpacking outings in the warmer months several times, and we have even used them like a liner in a heavier bag on colder outings. They back down small, the zippers are easy to use, and they have just held up very well to the abuse my three teenage, BSA Boy Scouts have put them through.
Yes , I recommend this product
Originally posted on marmot.com
Jlpatte2
Nc
Great summer bag, but narrow
1 year ago
[This review was collected as part of a promotion.] I have had this bag for two summers now, I'm 5'9",180lb so pretty average, and this bag is slightly too narrow at the shoulders, I very rarely zip past the elbows. I love the weight and size though. Will probably give it to my son to replace his kids version and find a slightly wider bag for myself. If you are broader than normal is avoid this bag.
Yes , I recommend this product
Originally posted on marmot.com
JNUfishgirl
Juneau, AK
compact light sleeping bag
1 year ago
[This review was collected as part of a promotion.] Was very happy when I received this sleeping bag. It is compact, lightweight and will work great for summer camping. Also the fabric has a soft feel so will be great to sleep on instead of the typical plastic feel of synthetic material. I have not used the bag yet, but will update after use.
Yes , I recommend this product
Originally posted on marmot.com
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