Nova Bivy With Full Insulated Coverage

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Full coverage bag using Apex synthetic insulation. With center zipper, hood and waterproof/breathable ultralight shell material.

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Due to Apex supply issues this product is currently unavailable.

The Nova Insulated Bivy is for cowboy camping; flat tarp users; any activity in moist and damp conditions; or as an outer shell in a winter setup. 

As a one piece bivy/sleeping bag the Nova Bivy is easy and fast to get in and out of, allow sitting activities, and take full advantage of the synthetic APEX insulation. Combined with an advanced waterproof/breathable shell one gets enhanced dew, splash, mist and light drizzle/snow protection. Not suitable for prolonged exposure to direct rain.

During bug season this full coverage bag can be used effectively with a head-net (not supplied) for complete protection.

Designed as a modular piece with a generous fit the Nova Bivy can be used alone for summer time trips; and then layered up with the Nano Liner for the colder seasons. Adding an insulated down or synthetic jacket further expands the possible combinations.

The Bivy is available in 50°F, 42°F or 35°F. The Nano Liner can be had in either 40°F or 30°F. If used correctly the warmest combo (35°F/30°F) should provide reasonable comfort down to negative 5°F. See chart below.


Full coverage bag with generously sized front/top entry.

Scalloped top with lower cut front/slightly taller back.

Waterproof/breathable shell. Not seam taped.

28" front zipper with top snap closure

Shoulder/neck drawcord closure, operable from the inside when the optional hood is selected.

Optional insulated hood with face opening drawcord closure.

The Nova Insulated Bivy is not designed to have a ground pad inside the bag.

To be used with or without a Skaha Jacket and Nano Down Liner. If using with

the latter, please refer to the blue chart for the combined comfort temperature ratings.


Very versatile! I use it all year round!

I prefer backpacking with a bivy and poncho tarp. I sleep super cold, so I was pleased to see Nunatak started to make this product. I got the 50° with uninsulated hood. I thought I’d only use this for the shoulder seasons, but I have used it by itself in hot weather, with a 30° down elephant’s foot and hoodie during most non-winter trips, and with a 10° down quilt during winter. It pretty much goes with me now on all trips except for fastpacking trips now. I got it with a waterproof Robic shell and 0.5 Membrane liner. I really love that I don’t have to worry about the bag hitting a wet tarp wall and soaking into the insulation. I also don’t get any condensation like I do with my other bivies. I love staying in the bag around camp while drinking coffee and eating breakfast. It doesn’t pack down as well as down, which is expected, but I actually just shove all of my clothes and stuff that needs to stay dry inside the bivy, then shove the bivy in my backpack without a liner, so it kinda serves as a waterproof stuff sack (My backpack is almost 100% waterproof). I accidentally got two holes in the shell after an accident with my hiking poles, but it sealed up nicely with tenacious tape. As always, the sewing quality is superior, and I would highly recommend it. The only thing I’d do differently if I were to order it again is MAYBE get an insulated hood. I’ve never really needed it, but maybe I wouldn’t need to wear my hood in my jacket or a down beanie/balaclava if my bivy’s hood was insulated.



The following is from a tester using a prototype:

Long story short, I am 100% AMAZED at how warm and comfortable I stayed in the Nova + Arc UL. By my thermometer, temperatures got down to about 25 degree F, and there was a steady breeze with gusts of approx 20-30 mph all night long at a very exposed campsite, so wind chill was actually quite a bit lower. That said, wrapped up in the bivy I barely noticed the wind and it never cut through the bag to my core.

On top of the cold / wind, that night it snowed about 4". Again, I cowboyed and had no over tarp just to see how the setup would handle moisture. Aside from periodically shaking off snow when I woke up throughout the night, I didn't do anything special. The Nova didn't wet out--the outer WPB layer seemed to stay cold enough and insulate well enough--and as best I could tell the synthetic insulation actually remained dry as well. I inspected the Arc UL the next morning and could find no signs of condensation or moisture on the body of the quilt.

The only moisture build up I experienced was (unsurprisingly) near the head area. I don't have a good picture but the Nova had notable moisture near the opening and head area.

I was nervous I was going to freeze to death with such a light setup for a winter bivy, but walked away the next morning feeling totally confident in the Nova. In fact, I would definitely feel comfortable marketing and emphasizing how sweet of a piece this is for winter camping. I would think most people could be very happy in the winter by pairing their 3-season quilt with a Nova and shaped tarp.


All Around Rockstar

I used this on Mt. Shuksan for a week. Paired with a quilt, this thing is a furnace. Despite massive winds I remained toasty throughout the night. The 42 degree option might even be warm enough to use as a dedicated summer sleep system. The fitting on it is really nice. The hood fits perfectly over your head. Overall this thing rocks. I've only taken it alpine climbing so far and it has exceeded expectations.

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Nova Bivy With Full Insulated Coverage

Nova Bivy With Full Insulated Coverage

Currently unavailable.

Full coverage bag using Apex synthetic insulation. With center zipper, hood and waterproof/breathable ultralight shell material.

Product Options
Temperature Rating
These are conservative ratings when used as a stand alone product. Add an ultralight down insulated liner for significant temperature boost.
50°F / 10°C
42°F / 5°C
35°F / 2°C
42°F / 5°C from the waist down ~ 50°F / 10°C upper body.
35°F / 2°C from the waist down ~ 50°F / 10°C upper body.
35°F / 2°C from the waist down ~ 42°F / 5°C upper body.
Shoulder Width
For most folks the 32" width provides enough room for layering with a puffy jacket and/or Nano Down Liner.
Footbox Size
The 40" footbox is based on a standard male size 10 foot.
For use as an 'over bag' please go up one or more sizes from your base bag/quilt.
Liner Material Options
Choose between lightest - the 10d - or long lasting comfort at the penalty of several ounces extra weight: the 20d

Unselecting the hood saves 30 grams

No Hood
Please add a fully insulated hood
Stuff Sack
Our stuff sacks are pretty dope, but current weight saving trends in ultralight circles eschews this once crucial item. So, opt out and save $ while also being very current.
Yes, please include a stuff sack
No stuff sack
Your Measurements
Optional: Fill in the blanks to ensure getting the best fit. No changes will be made to your size selections without approval
Shoe Size