DownTek combined with our fabrics is super efficient at purging moisture
Down is one of the lightest, compressible, and versatile insulations available. We choose to use RDS-certified DownTek™down. DownTek is goose or duck down treated with a water-repellent coating that helps it resist moisture and dry quickly. It is not waterproof, so normal precautions -- like pack liners, dry bags, and stuff sacks -- should be taken to keep your gear dry. But you can read about one test here.All of our down is sourced from Europe. It is a side-product from the meat industry, and third-party audits verify that none of the down in the supply chain is acquired through live plucking, force-feeding, etc.
Down is measured using a system called fill power. Fill power (fp) is a way of measuring how much space a given down type can fill. For example, 1 ounce of 850fp down will loft up to fill 850 cubic inches, and 1 ounce of 950fp can fill 950 cubic inches.
Since insulation works by trapping microscopic air pockets, a higher fill power can trap more air pockets per ounce. For use in a sleep system, this means that fewer ounces of down can be used to provide the same insulation by moving to a higher fill power. A 20°F rating is always 20°F, but by choosing a higher fill power, less down (by weight, not volume) is used to achieve that insulation rating. Enlightened Equipment uses Grey Duck Down (GDD) for our 850fp down, and Grey Goose Down (GGD) for our 950fp down.
Loft is the measurement of how thick your quilt or sleeping bag is at the top of the baffle. You can figure out the loft of your down item by laying it flat and measuring how thick (or tall) your quilt or bag is. We use the following loft measurements for our temperature ratings:
50° - 1"
40° - 1 1/2"
30° - 2"
20° - 2 1/2"
10° - 3"
0° - 3 1/2"
30° Regular/Regular Enigma APEX (Blue) vs. 30° regular/regular down-insulated Enigma (black)
The synthetic material we use is called Climashield APEX synthetic insulation, which is one of the lightest and most versatile synthetic insulations on the market today. Synthetic insulation has some tradeoffs with down that may or may not make it more suitable for you. While it's less compressible and somewhat heavier when used for larger items like quilts, it performs excellently in all weather conditions. APEX is faster drying, easier to clean, and generally more affordable. They are a great choice for warm weather as they resist humidity and don't succumb to migration and clumping like down.
We use the following APEX weights of insulation per temperature rating:
50°F - 2.0 oz/yd²
40°F - 4.0 oz/yd²
30°F - 6.0 oz/yd²
20°F - 8.0 oz/yd²
Synthetic material weights may vary +/- 10% due to production variances.