Alpinist UL

New product

The Quilt Killer. Custom 28° all-out ultralight mummy. 

More details


Add to wishlist

Pay via Credit Card or Paypal Account
Pay via Credit Card or Paypal Account

The UL (ultralight) version of the Alpinist, here offered as a 28° high mountain summer sleeping bag. This is the thruhike setup for those finding limitations with backcountry quilt usage: eliminate the drafts, no straps to get tangled in, convenient head coverage without a full burrow or down balaclava.

22.4 oz in size medium for an all around wrap of lofty down with the unique center zip that allow sitting chores with your back and head covered.

Only the lightest fabrics and materials are applied to the Alpinist UL. 

The down fill is carefully calculated and graduated to provide maximum insulation where it matters. 

Extensive custom options allow case by case sizing and/or further weight savings.

Optional weather proof shell in full or partial coverage.


Write a review

Alpinist UL

Alpinist UL

The Quilt Killer. Custom 28° all-out ultralight mummy. 

Product Options
Temperature Rating
28°F - minus 2°C
Shoulder Width
The standard works for most.
Foot Box Circumference
Zipper Length
Shell Material Options

These are the Classic breathable ultralight shell options, typically listed from lightest to most durable. 

Please go to the Fabric Page for help choosing the shell material.

Waterproof/Breathable Shell Options

The top four in this selection applies a 7d waterproof/breathable shell fabric to the foot section, plus the top near the head opening. The large vertical baffled middle section remain with the material/color chosen in the previous field . Select colors to match - or not! The second choice, represented by 'Full Coverage', will completely replace all other shell choices with a full coverage of the same waterproof/breathable 7d ultralight shell.

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. A 5% increase in fill weight also occur.
900 Fill Power Goose Down, RDS Certified
900 Fill Power Goose Down, Hyper-Dry, 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. Expect a weight increase ranging from one to six ounces depending on the product, the size and the rating.
Draft Tubes Along Zipper
De-selecting draft tubes saves up to 40 grams depending on zipper length.
No Thanks!
Dual Draft Tubes Along Zipper