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Rated 4 out of 5 by from Good bag - undersized stuff sack I bought 2 of these for y-guides warm weather outings. I bought the Long b/c I like the leg room. These bags are soooooooo hard to get back in the stuff sack that I want to scream. Maybe it's the extra length but these stuff sacks are too small. I have 3 other marmot bags (never summer, lithium, and the sawtooth) and NONE are this difficult to get into the stuff sack. Wrist breaking aggravation. I even ripped the compression strap stiching trying to use the straps as a leverage point to jam this bag into the stuffsack. But like I said I love the bag itself.  Save some aggravation and buy a cheap/better stuff sack to go with it.
Date published: 2014-07-07
Rated 5 out of 5 by from Packs small and perfectly rated. I've used this sleeping bag 4 times now and it's an absolute marvel of modern technology. It's warm, it's comfortable. The bag is a mummy shape so your foot-space is going to be limited anyway but that is to be expected. I'm 6'2" tall and the Long size was the perfect size for me. It packs inside of my backpack and is about 1 liter and a half. Very tiny and less than a kilo of weight. The only drawback is the bright red color. Very loud and obnoxious. I try to keep my equipment more subdued but the quality/size/price of this bag was too good to pass up. I'm very pleased with this purchase.
Date published: 2013-09-27
Rated 5 out of 5 by from Definitely worth getting It's a really solid little sleeping bag. The included compression sack packs it down to a little larger than a football. When camping with it recently, there was an unexpected cold snap (just above freezing) and the bag performed really well and I was able to sleep comfortably through the whole night. I was wearing almost all the clothes I had packed though. There is no brushed fabric on any parts of the interior of this bag, like it says in the description online. Inexplicably, the EN 13537 temperature ratings are missing as well, even though they were included with the bag when I purchased it. They are 56.1 F (13.4 C) for comfort, 49.6 F (9.8 C) for lower limit, and 27.1 F (-2.7 C) for extreme.
Date published: 2013-05-02
Rated 5 out of 5 by from Great cool weather bag I bought two of these bags for a recent trip to the bottom of the Grand Canyon. Temperature ended up being around 60 deg F on the night we camped. I was comfortable in the bag without socks and a light T-shirt and shorts. My wife was a bit chilly even with socks and a long sleeved shirt so I guess it is true that men are more resistant to cold. So, if I had to do it again I would definitely do this bag for me and maybe a bit heavier bag for my wife. The size and weight were perfect for fitting in my back pack along with compact air mattresses and all of my other gear. I also like the relatively low price. I would definitely buy this product again.
Date published: 2015-05-12
Rated 5 out of 5 by from Used 40 days in a row - held up great I used this bag to walk the Camino Frances in Spain for 30 days and then used it to sleep in an RV in Iceland for 10 days. The bag held up well. I did use a bug resistant liner. The bag is light and packs into a stuff sack that is included. I did not struggle to get the bag in the stuff sack. The only thing to note is this bag does not come with a loose fitting storage sack. It only comes with its own stuff/compression sack. I liked my choice of this bag.
Date published: 2013-08-18
Rated 5 out of 5 by from Good light weather bag I backpack or camp around two times a month in many deferent environments. I have a 20 degree down bag that I have used for 4 years and found that sometimes it is just too hot. That is why I bought the Marmot NanoWave 45 Sleeping Bag. I have only used it 4 times so far and it has worked out well for me. One of the nights was in the upper 30s and I stayed conferrable. I got the bag in the long size because I'm 6'2" and 190 lb. I found it to be a good fit.
Date published: 2013-06-28
Rated 4 out of 5 by from Summer Bag Pro's : light weight; definitely rated properly for temp, packs super small and light. Con's : not a full zip bag; foot bed is narrow love this bag because it is so light weight. It is NOT hard to put into the compression sack at all! I do think that getting out the first time was hard because Marmot decided to roll it into the compression sack instead of stuffing it. wish it had a full zip. Otherwise perfect summer / spring bag.
Date published: 2014-06-27
Rated 5 out of 5 by from Great deal, light and versatile I've used this bag a few dozen times over the past year and have come to really like it. I just slept at 45 degrees and was just warm enough wearing some thermal underwear and socks. Anything warmer it's a dream. I never got the sleeping bag back into the compression sack, but it's so small I haven't really needed to compress it, just put it in a stuff sack. I think it's a great deal.
Date published: 2014-12-16
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Questions & Answers

What is the zipper size so I can compare it to other bags for potentially joining this bag with another?

Asked by: Terence
This bag has a full length YKK zipper size #5.
Answered by: REIservice
Date published: 2017-05-30

What is the lowest temperature one can be comfortable in this bag? How accurate is the temp rating on this bag? Thanks

Asked by: bleuz
The NanoWave Sleeping Bag has a temperature rating of 45 degrees Fahrenheit. It has an EN rating of 56.1 degrees Fahrenheit for comfort and 27.1 degrees Fahrenheit for extreme situations. EN rations are highly reliable.
Answered by: REIservice
Date published: 2017-05-30

Is the zipper 2 way like the nano 55? 

Asked by: SurfQueen
​Yes, this sleeping bag has a 2-way zipper similar to the Nano 55.
Answered by: REIservice
Date published: 2017-04-19

What is the compressed volume?

Asked by: Blazemore
The stuff sack packaged with this sleeping bag is roughly 5 liters.
Answered by: REIservice
Date published: 2017-06-21

What liners are available for this bag -

Asked by: DeweyCox
We have several liners available depending on what type of liner you would like to purchase. You will find liners online here:
Answered by: REIservice
Date published: 2018-01-04

How should we store the Marmot NanoWave between camping trips? Someone told me it needs to be taken out of the compression sack, but I could not find that documented or justified anywhere (it's a bit of an inconvenience).

Asked by: Rugged Boris
A sleeping bag should not be stored in a stuff sack or a compression stuff sack. Store the bag loosely. We sell a large, breathable storage sack:
Answered by: REIservice
Date published: 2017-05-30
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