REI Co-op - Hammock Underquilt

Category: Sleeping Bags

Used this for the first time in colder temps. First night got down to 40°, and I was nice and toasty. Second night got down to 33°, and I was chilly. Just cold enough that I woke up several times. I was in a down bag (EN 20° comfort rated) and thin polypro base layer.

Positive: Fit like a glove my quarter dome hammock Negative: Did warm up the backside, but not much. Kept the night from being very uncomfortable, but still had some cold spots.

I’ve only had the chance to use the underquilt once, but I’m 100% satisfied with it. Fit and finish is excellent.

I wish it was a bit longer and a bit wider as an underquilt, but I just used this as a blanket while camping and it exceeded my expectations. Bundled up in medium weight clothing, and sleeping on top of a down quilt, all I had on top of me in 27 degree weather was this underquilt and I was toasty warm all night.

I am a Florida boy , I get cold easily , with that being said I used this underquilt with my Quarter Dome Air Hammock , love the fit and ease of set up . temps in the mid to low 40s using a Klymit Static V Luxe pad and this underquilt , I got cold from the bottom. I had to add a blanket under me , once i did so i was fine



When will this be available again?

Please contact us directly at (800) 426-4840 for more information about backorders.


When it says the temperature rating is 30 degrees does that mean you can sleep without a sleeping bag in this tent down to 30 degrees?

​The temperature rating of 30 degrees means, when you pair this Underquilt with your hammock and a top quilt you will be comfortable down to 30 degrees Fahrenheit.


Was this discontinued? I cannot seem to find it for sale anywhere now

​As of October 2017, we are sold out but expect more stock in spring 2018.

Mike S

Will this underquilt work with a Hennesey Expedition Zip hammock? If not, can you recommend one that will?

It is possible to use this underquilt with the Hennessy Hammock Expedition Asym Zip Hammock. However, it will not extend the entire length of the hammock, as the underquilt is 7 feet long and the Expedition hammock is 8 feet 4 inches long.


what is the pack size of the under quilt? 

​The storage sack included with the underquilt measures 20 x 10 inches. The stuff sack measures 12 x 7 inches.

hike at

Will this under quilt work with the eno double nest?

​It is possible to use this underquilt with the Doublenest hammock. However, it will not extend the entire length of the hammock; the Doublenest is over 9 feet long (114 inches), and the underquilt is 7 feet in length.


What's the compressibility of this under quilt like compared to down under quilts? Will this dominate my pack space?

​This under quilt provides comparable warmth to the down hammock quilts, but will take up more space in your pack compared to a down under quilt.


Since this underquilt will be on the outside of a hammock is the ripstop nylon material waterproof or water resistant?

​The outer material of the underquilt is water resistant. It is not waterproof.


The dimensions are very similar to ENO UQs. Is this compatible with ENO hammocks?

​This underquilt can be used with ENO hammocks.


Can this be used as a quilt for the Quarter Dome 3?

This quilt is designed to be used as an insulating layer under the REI Co-op Quarter Dome Air Hammock.


Will this work with The Kammock Roo?

It is possible to use this Underquilt with the Kammock Roo. However, it will not extend the entire length of the hammock, as the Underquilt is 7 feet long and the Kammock Roo is 10 feet long.


What is the temperature rating for this underquilt?

30 degrees


Will work with a Warbonnet Blackbird hammock

This quilt is designed to work with the REI Co-op Quarter Dome Air Hammock. As of July 2017, we have not had opportunity to test it with other brand hammocks.


What brand of insulation is used in this product? Thinsulate?

We are using a non brand name, high quality synthetic fill that is used in a variety of sleeping bags and apparel pieces.

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