new bag offering from Nunatak

Yeah if I thought I was going to be in a bunch of warm weather nights, I’d have gone a different route.  I seldom (never?) have to worry about warm nights :)

Got to try out the new bag last week tackling the Wonderland Trail.  Didn’t get to test the lower limits of the bag as the coldest it got was in the low 40’s, but the ergonomics of the bag worked well.

It was easy to pull on/off, a concern I had, but no longer. The cut was plenty roomy, without being too roomy. Inner fabric was comfortable The 74” length (I’m 5’11”) was long enough that I could fully pull it over if needed.

As warm as it was in the low 40’s, I’m confident that it will handle mid 30’s with ease.

Two thumbs up :)

Great to here as I recently contacted Nunatak and placed an order for a custom Sastrugi.

Mike thanks for this thread and info, it’s been very informative and helpful.  BTW you get any smoke up there in Wonderland?

Jan is very helpful, easy to work with, and their products are simply excellent.

Yeah Jan is great to work with.

We were mostly clear on Tuesday (despite smoke in the campground on Monday evening) little smoky/hazy Wednesday and Thursday and thankfully a system rolled in Friday morning and cleared it out. So overall, pretty good.

The Nunatak Sastrugi zipless sleeping bag is on their web site with many options.

However – Current break runs through January 15, and they are already backlogged about 10 weeks.

Interesting to compare with FF Tanager, also backlogged, but only about 3 weeks.

— Rex

I ordered a Custom Sastrugi about 10 weeks ago and it is sewn and being filled. Jan is incredibly easy to work with and being able to customize dimensions, temperature rating, color, and fabric choices were a very big draw….plus Nunatak (as well as Feathered Friends) has a history of high quality of construction sleeping bags and garments.

couldn’t go wrong with either; but Turley hit it on the head- Jan has no problem fully customizing anything he sells- only a handful of companies like that

I fondly remember when Tim Marshall was starting out, I had 2-3 relatively wild ideas on gear and he was more than happy to give them a whirl- now he probably employs 20+ folks and customization is a not an option

Just received my Custom Sastrugi and couldn’t be happier with the result. The overall experience from time of initially reaching out to Nunatak (Jan) and receipt of quilt was amazing.

Hey all,

I am looking at ordering one of these from Jan once online ordering opens back up later this month.

Has anyone compared this to a FF Tanager, or perhaps owned both? Does anyone have any pics of it stuffed up in a small stuff sack? I am looking for a 1 pound-ish bag for light and fast summer travel that is about a 25-35 degree bag.  These bags seem very appealing due to no zipper and straps to fiddle with.  Jump in exhausted and fall asleep!

they are similar in design to Tanager, but Nunatak allows you to customize the size, the amount of fill and fabric

it’s very low volume, I’ll try and snap a pic this evening

Paired with a light fleece balaclava, light down jacket and medium long johns you should be good to 20 F. The clothing mentioned are double duty items that can easily be used during the day if needed. They are “safety items”.

As far as a 3 season mattress I’ve found Could use a Thermarest Prolite down to 15 F. and be OK. Now I use an REI FLASH Insulated 3 season air mattress with a 3.5 R rating. That too has been good to 20 F. so far with my WM factory overstuffed Megalite bag.

here’s a pic of mine (Nunatak) in a stuff sack, guessing 6-7 liters????  also this isn’t overly stuffed, I’ve gotten away from stuffing my down stuff too much

Thanks Mike, good to visualize that for sure.

I am hopeful to get that bag with a light bivy and Thermarest into a 10L pack.

Defiantly looks doable and would not jeopardize sleeping good around freezing temps.

if you wanted to, you could get it even smaller than I posted

I’ve done several 2-3 day trips in the past with a 20-ish liter pack, but have never done one with a 10 liter pack-should be fun! :)

In my quest to find the right quilt/bag that works for me I’ve been considering the Sastrugi. In my research I found a unique hybrid made by Cumulus. They have 3 models in this line, 2 with a hood and a summer one without (total weight 10.6-17.0oz, 6.3-11.6oz fill). It is like a combo of a zipperless Sastrugi/Tanager and my old Marmot Quark, which put synthetic insulation on the bottom of the bag since the down gets flattened there.

These Aerial bags just put a “single air sealing layer of fabric in the bottom of the sleeping bag” and don’t waste the weight using down or synthetic. I wonder if a side or active sleeper would find this comfortable, or if there would still be an issue with drafts getting through that fabric.

https://cumulus.equipment/us_en/down-sleeping-bag-aerial-250.html

I could be wrong, but unless it’s a very thin strip of single layer fabric—when a guy rolls over, you could likely feel a draft.

Just a HU: the internal dimensions on the Cumulus Aerial bags are on the tight side.
I don’t get the point of having a hood on a bag in this temperature range, plus it sort of limits you to sleeping only your back. I also don’t like the very, very low CFM fabric that they use, but it does cut heat loss from convection. YMMV.

GVP seems to love his Aerial 330.

No draft problem.

I suppose if you and the bag rotate on your side, you backside would chill not from a draft but from no insulation. You need keep the underside of the bag pointed down. There is a small exception… just under the shoulders and head is fully insulated, you that part could be twisted/lifted.

Personally, my problem is that I often am too hot and need to vent, so I am still a quilt user.

I’ll just say that I have a false bottom 7D Serpentes bag from Timmermade that I love. The false bottom provides an effective way to dump heat in the torso area, but not in the feet, which is where I really need it, usually. But the false bottom still really helps at temp regulation. FWIW, I don’t find it difficult to keep the false bottom under me, but that’s because I’m already used to using quilts. Timmermade also offers a false bottom 10D bag with a strap to keep the bag in place.

Yeah I noticed the 60″ girth. Way too thin for me, and I roll as well, just thought these bags were interesting. Wish I was a through the night back sleeper, it would make things so much easier!

Jon that looks really cool especially with the ability to get more custom widths and then be able to cinch up to a full insulated bag like the Tanager/Sastrugi. Thanks for sharing this option!