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.
A few things to keep in mind:
These two quilts are designed to balance the lowest possible weight and bulk with the level of comfort needed in the western US mountains during the summer hiking season.
The 30° Arc UL is warm enough to serve as a general purpose quilt for an experienced backpacker.
The 25°F is the sweet spot for folks not knowing if a changing climate really warrants a 20°F quilt anymore.
Fill and Loft
The 900 fp down loft is a between 1.90” and 2.25”. Fill volumes for either level are detailed in the charts.
The length is in 4" increments. The chart numbers interprets where the quilt top is 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 size up if in doubt. Bags and quilts cut too short tends to compress the foot area insulation to the detriment of cold toes.
Adequate width in the shoulder to hip region is crucial for sleep comfort and draft control. A ball park figure to achieve optimal performance is your shoulder circumference plus 6"-10". The Arc UL does not taper inwards until below hip level.
Newcomers to backcountry quilts can also experiment with a measured blanket before committing to a width.
Foot End Design
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.
Shell Material Choices
More details on the Fabric Page, found in the top menu under Materials.
Ultralight: 10d ultralight breathable shell.
This ultralight fabric creates a comfortable sleep environment at the lowest weight. While providing very little protection from moisture, the superior breathability allows it to dry quickly in the sun. Ideal for users seeking the lowest weight.
Classic: 15d lightweight breathable shell.
Same non-existent moisture protection as the 10d above, but an increase in durability and tear strength. Expect a weight gain up to one ounce, depending on size.
Liner Material Choices
Long term wear on quilt fabrics is most pronounced on the inside liner material. To anticipate this the Arc UL can be upgraded to our soft, durable 20d Taffeta black liner, specifically developed for sleeping bags. Expect one ounce of weight gain if selected full 20d inner, less than half an ounce for the foot area only.
What's in the box?
The quilt, a set of quilt straps, an optional silnylon stuffsack and a large breathable storage sack.
We also have additional articles with helpful pointers on selection and design:
Go to the bottom of this page for the full Arc UL Configuration Menu.