Sastrugi

New product

Order Window: Sept - Oct 2022

Zipperless bag. Simple, light and no nonsense. 

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$330.00

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Pay via Credit Card or Paypal Account

Order Window: Sept - Oct 2022

If you need this you will know.

High quality 900 fill applied in a generous quantity, cord at the top, light fabrics, no inward taper until hips. Pro tip: down can be shuffled from topside to underside, or vice versa.

Perfect inside a synthetic over-bag for gnar conditions. 

Concerned about getting in and out of a zipperless bag, and hot weather venting? Look elsewhere.

Sastrugi; snow eroded by wind into ridges. A skier's nightmare.

Grade 
12/29/2022

Update on previous review

I’ve had a few nights to test drive my Sastrugi lately, here’s my results- Two nights in the low twenties, under overhanging branches but no shelter; wearing a large hooded puffy and a warm hat. I slept just fine, plenty warm. No problem with drafts on the hoodless design. I’m generally a warm sleeper, but I’m pretty excited that a comfortable night in those conditions is possible with this bag. If i was ordering again, I’d do the overfill option; I didn’t notice it was so economical. Otherwise no changes.

Grade 
12/13/2022

Outstanding so far!

I’ve been out for a few nights in below freezing temps with it now- I’m a big fan of this concept and the build quality. I’m 5’10”, 185 lbs, and got a 70”x62” 28 degree in brilliant blue. It’s startling how light it felt when I took it out. At first glance I got worried I’d gone too wide, but after the first night I think it’s perfect. With a big puffy inside to boost it to winter temps there’s still room to move. I can pull my knees up and touch my feet- haven’t done that in years in a mummy bag. Awesome, can’t wait for more cozy nights.

Grade 
11/02/2022

Amazing bag for a giant

I am a pretty tall glass of milk at about 6’10” and Nunatak was amazing to work with and get me the bag I needed. I opted for the zipper less sastrugi and it is one of the nicest bags I’ve ever used. Keeps my warm when I cowboy camp up in the NC Appalachians. I can’t complain about anything, bag is flawless, the right size, and packs down small. Only thing that you could complain about is the price. But this is one piece of gear I wouldn’t penny pinch on. Made in USA, small cottage brand, yeah I expected to pay a little more but my options were few and far between anyways because I am a jolly green giant. No on ever says to themselves when they’re out on the trail “oh damn I wish I hadn’t bought this amazing piece of gear that accomplishes everything I need it to.”

Grade 
09/14/2021

The Perfect Bag - NO DRAFTS!

https://imgur.com/gallery/eTGWaKQ pics of my Sastrugi.

I got a 28F sastrugi w/ overfill and have used it for ~6 nights without baselayers (male sleeper). The highest night was 48F which was almost too hot for this bag, but it worked okay with leaving the top open. You can also just drape the whole bag over you like a blanket or roll it down halfway on warmer nights. Lowest night was 36F which was really cozy.

I was concerned about the entrance/exit with the zipperless design, but it's not really a big deal, and it eliminates the draft, so I'm happy with it!

It would pair nicely with an apex/alpha quilt (or bivy) for a wide range of use.

Also of note - I'm 5'10 170lb male and got the 70"/62"/40" dimensions and it was roomy! Especially in the torso region, you can fit a huge parka in if you want!

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Sastrugi

Sastrugi

Order Window: Sept - Oct 2022

Zipperless bag. Simple, light and no nonsense. 

Product Options
Temperature Rating
 
18°F - minus 8°C
 
 
28°F - minus 2°C
 
Inside Length
 
62" - Extra Small
 
 
66" - Small
 
 
70" - Medium
 
 
74" - Long
 
 
78" - Extra Long
 
Shoulder Width
 
56" inside circumference. Small frames, skinny people
 
 
59" inside circumference. Regular
 
 
62" inside circumference. Regular Plus
 
 
68" inside circumference. Very roomy.
 
Footbox Size Circumference
 
36"
 
 
40"
 
 
44"
 
Differential Cut
 
Yes. Please!
 
Shell Material

 
Moroccan Blue Ripstop 10d - Lightest, most breathable
 
 
Grey Ripstop 10d - Lightest, most breathable
 
 
Purple Ripstop 10d - Lightest, most breathable
 
 
Forest Green Ripstop 10d - Lightest, most breathable
 
 
Dark Olive Ripstop 10d - Lightest, most breathable
 
 
Brilliant Blue Ripstop 15d - More durable, breathable
 
 
Grey Ripstop 15d - More durable, breathable
 
 
Moroccan Blue Ripstop 15d - More durable, breathable
 
 
Black Ripstop 15d - More durable, breathable
 
 
Purple Ripstop 15d - More durable, breathable
 
 
Dark Olive 15d - More durable, breathable
 
 
Dark Forest Ripstop 15d - More durable, breathable
 
Liner Fabric
 
10d Black Taffeta - Lightest, most breathable
 
Down Type

Choosing Hyper-Dry moisture resistant down will help combat the effects of perspiration, misting tents and damp air. Nunatak products made with Hyper-Dry down will have a slight increase in bulk over those made with regular down.

 
Untreated
 
 
HyperDry
 
Down Overfill

Adding overfill can prolong the life of the down, help maintain loft during moist conditions, boost the temperature rating by a small amount and keep the down volume from shifting. For most quilts/bags the overfill amount ranges from 45-65 grams of extra down

 
No Thanks
 
 
Overfill evenly throughout
 
Your Measurements
Height 
 
 
Weight 
 
 
Shoe Size 
 
 
Stuff Sack
 
Yes, please include a stuff sack
 
 
No stuff sack