“Sierra Designs is expanding the hydrophobic DwrDown fill to its entire down sleeping bag line.  For 2013 they’ll offer 700-fill general purpose bags, 800-fill ultralight bags and 800-fill expedition bags.

The company is also moving to the more accurate EN test rating for sleeping bags.  With the Cal 6, Cal 13, and Cal 30, Sierra Desings is expanding its external pitch tench technology for 2013.”