The Arc UL quilts are designed for optimal efficiency in the environments met by long distance hikers.Custom features including sizing and weight saving options.
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Custom item. Multi week lead time.
This Arc UL is designed to balance the lowest possible weight and bulk with the level of comfort needed in the western US mountains during the height of the summer hiking season.
The two temperature ratings on the menu are realistically defined as either 40° or 30°F. The loft is a minimum of 1.25" or 2.0".
The 30° Arc UL is warm enough to serve as a general purpose quilt for an experienced backpacker in a variety of environments.
The 40° version is the 'go light and fast' choice with obvious compromises in cold weather ability.
Fill volumes are detailed in the charts, and offer further insight into whether these quilts will meet your needs.
The length is in 4" increments defined by measurements plus X-Small to X-Long descriptors. Using this system you can choose how far up the quilt reaches when on your back. In open mode reaching just the chin level is the absolute shortest anyone should go, and then only on quilts for the warmer seasons. Reaching the user's forehead is the best compromise of low weight - efficient coverage. As always, it is prudent to size up if in doubt. If just a little too short one tends to compress the foot area insulation to the detriment of cold toes.
The shoulder and foot area widths can be customized for individual needs and sizing. Newcomers to backcountry quilts can experiment with a blanket before committing to a sizing setup.
Foot End Design
The Arc UL quilts are offered in two foot box configurations, also in the menu below. The traditional Arc design is a permanently closed section finished with a round bottom piece sewn in place. A design common with high-end mummy bags.
The Vector foot end allow the user to switch from closed to blanket style open foot area in a few simple steps. This option, while very adaptable to changing conditions, lack a in thermal efficiency compared to the regular Arc. It also adds some weight, for those who count every gram. A page with a few pics detailing the foot box options is here.
Shell Material Choices
Immediate apologies for the complexity of the following!
We offer the discerning user an option to fine tune the performance of the Arc UL via a series of technical shell materials.
Basically there’s three distinct categories:
1: Classic breathable shell.
These ultralight choices create a comfortable sleep environment at the lowest weight. They will, however, wet out and transfer moisture to the down if exposed to dew, mist and damp tents. On the other hand, the superior breathability allows them to dry quickly in the sun. Ideal for moderately dry weather, desert hikes and anyone with a traditional double walled tent.
2: Robic ultralight waterproof and breathable shell.
With this as your outer material there’s minimal concern about external moisture migrating to the down. Also, the lesser breathability boosts the temperature rating a small amount.
The choice for wet environments, ‘cowboy camping’ and for users of flat tarps wanting to eliminate the bivy bag. The Robic has a very light denier count, and as such adds under 5% to the total weight over the Classic option.
3: A combination of Classic and Robic shells.
With Robic only covering the outer foot section and top draft collar you can protect the down where it matters the most, while leaving the large mid section fully breathable. For use in the modern single wall tent where rampant condensation often collides with the lower end of sleeping bags. Also, the draft collar is protected from moist exhalations. A very versatile setup.
Look closely at the configuration table below, in order to select precisely what suits your use.
Liner Material Choices
The worst long term wear on quilt fabrics is the inside liner material. If you want to break with true UltraLight traditions, and risk adding up to 2 ounces (!!) of weight, the Arc UL can be upgraded to our soft, durable 20d Taffeta black liner, specifically developed for sleeping bags.
Besides the custom sourced shell and liner materials, we also consider shock cords, buckles, snaps and other notions as specific targets for UL optimization, further shaving grams.
What's in the box?
The quilt, a set of quilt straps, a silnylon stuffsack and a large breathable storage sack.
We also have two brief articles with helpful pointers on selection and design:
Go to the bottom of this page for the full Arc UL Configuration Menu.
|Length and width choices affect fill weight by roughly ½ to 1 ½ oz, depending on temperature rating.|
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