3D Quilt Four Season

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Two levels of warmth offering true cold weather capacity in an advanced backcountry quilt design. 

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The 3D is our highest developed quilt, designed to provide ultimate efficiency via draft free warmth and weather protection, while maintaining the adaptability and ease of use of the modern backcountry quilt.

We make them in 4 temperature ratings, conservatively stated as 35°F, 25°F, 15°F and 5°F.  On this page you can select the sizing and features pertaining to the 15 and 5 degree versions.

The 3D was designed in a response to the luke warm reviews of the generic open bottom quilt when used in real cold conditions. While adequate loft is simple to achieve, it takes creativity to arrive at the necessary body-hugging shape and draft free closure, and at the same time retain most of the endearing quilt features we've come to love.


Two levels of insulation: Conservatively defined as 15°F or 5°F. The loft is a minimum of 2.75" and 3.25".  Fill volumes for either level are detailed in the charts below, and offer further insight into whether these quilts will meet your needs. 

Advanced baffle layout. Together with our carefully calculated fill volumes, the tapered and individually optimized baffles help to eliminate migrating down and cold spots. Along with loft, these are crucial design components for a cold weather quilt.

Differential cut. The outside of the quilt is built with a proportionally larger girth and length. This keeps the insulation fully lofted even when attacked by a restless sleeper.

No-strap design. The 3D Quilt is form cut to encourage draft free wrap, while the full zipper closure offers a last resort barrier on the coldest of nights. These semi-quilts will still adapt to the typical quilt blanket mode, however not in the same sprawling manner as the more traditional Arc UL, found here.

Goose down. We use only high quality 900 fill power goose down. Our batches are certified ethically sourced/harvested and can be tracked upon request.

Draft collar with left and right sided cord controls. The cozy, overstuffed neck collar holds the warmth inside and keeps tight cords away from skin.

Optional lining of extra durable fabric in the fully enclosed footbox. This area typically sees the most wear, whether from calloused feet or the storing and drying of footwear. Substituting the standard liner for a 20D material gives this area an edge in long term durability. Expect a minor weight increase.

Dual draft tubes along the zipper. These optional baffles are for users who anticipate sleeping with the zippered side anywhere but downwards.

Size specific zipper length. We install a zipper with a length that is balanced to the size of the quilt, ranging from 48" to 68".


The length is given in inches from the inside foot to the top of the neck baffle When cinched shut around a user's shoulders the length will shrink by several inches. Optimized for colder seasons, this quilt should be able to reach to the top of the user's head in open mode.

The width is offered in three sizes. 60" is the gold standard mummy circumference that fits most. Small frames will benefit from the 54" to entrap less dead air. Folks desiring lots of wiggle room can select the 66". 

2 footbox sizes are available. The 40" is good for most folks up to size 10 or 11 shoes.  


Correcting my previous rating - this is a five star bag!!

As per other review


Perfect bag/quilt combo made in heaven

I had a 10F made with all sorts of customisation, colours, mid size width, combo of water proof and non w/p fabrics front and back, the lot. Great advice on all fronts, even had sample fabrics sent because I couldn't make up my mind. I have recently owned an Enlightened Equipment Revelation quilt (0F) and this 10F is hands down way warmer - I had draft issues with the EE and find it really hard to get warm again. Have tested the 3D down to just above freezing in alpine conditions and also a couple of nights in warmer weather. Also recently owned a Sea to Summit Flame IV and where both of those other bags had warmth/draft issues, the 3D does it all. Warm when zipped up, easily aired in warmer conditions. It really does spread out like a quilt. My only minor gripe (minor!) is that I didn't know there was 40d fabric used along the zipper and it's very crinkly sounding. But only whilst zipping up. The bag is made so well, it's a joy to own. Draft collar works really well, not sure you'd need any water proofing along there, when done up snug, my collar kind of disappears in on itself around my neck which also makes the outside cords come closer to inside and super easy to handle without dangling in my face. I am 160cm and weigh 61kg, I got a 58 inch width which still has good room around the shoulders but maybe next time would consider going the standard 60 inch to get a little more space around the hips as I have a tendency to pull my legs up (feels a tad narrower on hips that SS Flame IV).
Personally, I cannot deal with a hood on bags, they always end up in my face; the balaclava you can order is super warm, doesn't do up very tight around the neck if you want a super snug fit but absolutely does the job of keeping my head warm - two colours, of course!

  • 1 out of 1 people found this review useful.

15° version

Here's write up:


  • 2 out of 2 people found this review useful.

New Standard

Outstanding design and workmanship; Ordered Jan.3 received Feb.23. have several higher end bags-this 3D is easily equal to or better. Thanks Jan.What a quilt!

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3D Quilt Four Season

3D Quilt Four Season

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Two levels of warmth offering true cold weather capacity in an advanced backcountry quilt design. 

Product Options
15°F / -10°C
5°F / -15°C
Inside Length
62" - Extra Short
66" - Short
70" - Medium
74" - Long
78" - Extra Long
Shoulder Width
54" inside circumference. Small frames, skinny people
60" inside circumference. Fits most.
66" inside circumference. Very roomy.
Footbox Size
40" circumference foot end
44" circumference foot end
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
Black Ripstop 15d - More durable, breathable
Purple Ripstop 15d - More durable, breathable
Dark Olive 15d - More durable, breathable
Liner Material
Breathable 10D Taffeta, Black.
Inside Footbox Liner upgrade
No Thanks!
Yes, please include 20d durable foot liner material
Down Type

Allied Expedry is a moisture resistant goose down treated with a chemical free, safe compound. Expedry helps reduce drying times while minimizing performance issues in wet weather. The treatment is long lasting and effective.

Untreated 900fp goose down only available on request.

900 Fill Power Goose Down, Expedry, RDS Certified
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 in foot section
Overfill in torso section
Overfill evenly throughout

#3 zipper allow the 3D to be opened up like a quilt but is lacking draftubes so when closed the zipper should face down to prevent heat loss.

#5 zipper includes dual draft tubes along the opening giving the user the ability to have the zipper facing up with no heat loss. 60g heavier and more expensive.

No zipper on a fully closed bag with top entry only. Light simple, efficient and less expensive. Winter use only

#3 YKK Coil with NO draft tubes.
#5 YKK Coil with dual draft tubes. Solid, versatile and 60 grams heavier
Closed bag with top entry only; Sastrugi-style with NO zipper
Integrated Neck Draft Collar with Cord Channel
Yes, Please!
Your Measurements
Shoe Size 
Stuff Sack
Yes, please include a stuff sack
No stuff sack