Gamut Climashield APEX Quilt

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Synthetic filled quilt offered in 35° - 42° - 50° options. Use as an over-quilt on top of a down bag or as a mild weather stand alone quilt.

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The Gamut

We spent the summer developing and testing the Gamut, and found it to be a great stand alone product. But even more so, the Gamut is the perfect companion piece to a down based quilt or mummy. More about this in a bit.

Basic features of the Gamut synthetic quilt

3 temperature ratings based on pre-cut and stabilized Climashield APEX sheets: 35° - 42°- 50°. 

Ultralight fabrics: Shell of either Pertex Quantum 0.8 oz/yd or Membrane 0.66 oz/yd. Liner material always Membrane. These are fabrics with very effective vapor transfer and a soft, pleasant feel. 

The Gamut exhibit proven quilt design with critical improvements: Blanket style layout with a convertible footbox (flat/open or closed/snug), drawcord end closures and our draft stopping strap system. Form cut fit and long lasting built quality rounds off the features carried over from our line of premium down quilts.

We wanted to solve a couple of other issues. The convertible footbox needed to be able to close up in a thermally effective manner. The basic idea of a stuff-sack style drawcord opening, while appealingly simple and foolproof, had to be improved. We re-cut the shape of the foot end of the quilt in order to bring the closure down and under the feet. This is a design change well needed in openable footbox synthetic quilts, creating a very tight and snug feel. 

The drawcord channels at the top and bottom behave differently due to the un-quilted construction with no baffle stitching. On our down quilts these channels are moved in from the ends to create insulated areas at the head and foot interface. This method will not work on synthetic covers. The solution is an internal channel of precise circumference, but changing in size with the different insulation values available.

When to choose Synthetic Insulation

As a stand alone moisture resistant, down-shifting immune quilt the Gamut surprised us. It felt warm and cozy, and sound sleep was ensured knowing that damp tent walls, or heavy dew, did little to diminish the loft. Quite comforting, in fact. 

The secondary use of the Gamut is as a booster over-quilt on top of down mummies and quilts. This solution is equally effective and can save the substantial investment in a dedicated winter bag. With the continuous sheet style APEX insulation there's always a cover over bald spots from shifting down in the main bag. Again, dampness from external sources is typically only affecting the synthetic, while below the down remain protected. And condensing body moisture that are settling in the steep temperature gradient of the outer layers are also away from the down. This quality is especially valuable in winter conditions.

Compatibility and Sizing

Nunatak down quilts and the Gamut are designed to join effectively with correct sizing for efficient coverage, and also minimizing the strap and snap clutter.

There's an option in the configuration menu of new down quilts to install the needed hardware for future Gamut over-quilt application. Backwards compatibility is possible by sending your old Nunatak quilt to us for the necessary mods when purchasing a Gamut. 

The Gamut will also fit over just about any existing quilt or mummy. It is however important to size it right. Call or email if in doubt.

The Gamut size run is highly customizable. Length, width and foot area are offered in many sizes and an untold number of combinations to fit all frames and applications.

Refills and zipper replacement!

Climashield APEX, being a synthetic insulation, will likely not last as long as a quality down fill. After extended use, involving several laundry cycles,  it could become 'flat' with significant loss of loft. If this happens, the Gamut design enables us to easily replace the fill at the Nunatak shop.

The zipper converting the quilt from blanket to semi enclosed state is also adapted for non-intrusive simple replacement by anyone with a sewing machine in 30 minutes.  And should it start presenting issues in the middle of a trip, there's little lacing tabs along it, enabling full closure with any string or cord. This feature also allows for significant expansion of the girth for use as an over-quilt with really bulky winter bags.

Built for the long haul!

The 42° Gamut is here over-quilting an Arc Alp 30°. The combined temperature rating is in the teens.

Nunatak down quilts snap to the Gamut, while still allowing the use of standard under-body straps. 

The openable foot box is designed with a domed cut that moves the cinch center under the feet when tightened.

Temperature Rating 35° - 42° - 50°
Inside length 65" - 70" - 75" - 80" - 85"
Length, open blanket style Plus 7" to above
Shoulder width options 52" - 57" - 62" - 67"
Foot Area Width 38" - 42" - 46" - 50" - 54"
Total Weight, 42°, Length 80", Width 52" x 38" 18.5 ounces

Great quilt!

I ordered a 42°, 85" length, 57" width quilt back in November 2016 and couldn't be happier! I am able to pack it down very small in a compression sack and it weighs very little. I recently used this with a 40° bag on a backpacking trip where temps at night were about 30° and I was very comfortable. I look forward to warmer months when I can use just this quilt on my trips!! Great product, company answered all my questions when I called prior to the order, kept me informed as the item was being made, and I look forward to ordering more items in the very near future!!

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Gamut Climashield APEX Quilt

Gamut Climashield APEX Quilt

Synthetic filled quilt offered in 35° - 42° - 50° options. Use as an over-quilt on top of a down bag or as a mild weather stand alone quilt.

Product Options
Temperature Rating
These are conservative ratings for the Gamut used as a stand alone quilt.
50°F / 10°C - 2.5 oz Climashield APEX
42°F / 5°C - 3.6 oz Climashield APEX
35°F / 2°C - 5.0 oz Climashield APEX
Inside Length, w closed footbox
For over-quilt use please go up one size from your base quilt. If over-quilting a mummy bag use your height as a reference for choosing the right length.
Overall Width
The 62" and 67" super wide options are only available in the 42° rating, and add substantially to the cost due to special manufacturing processes!
For over-quilt use please go up one size from your base bag/quilt.
Footbox Size/Width
The 38" footbox is based on a standard male size 10 foot.
For over-quilt use please go up one or more sizes from your base bag/quilt.
Shell Fabric

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

Liner Fabric
Strap package

Straps snugs the quilt around you and/or the sleeping pad. Options are: None (really?), ultralight shock cord style controllers, or the fully featured standard ¾" strap package.

2 Side Mounted Under Body Straps, Ultralight Version
2 Side Mounted Underbody/Pad Straps - Removable.