Stuffed with game-changing hydrophobic DriDown insulation, the ultralight, 800-fill Cal 13 is a go-anywhere, sleep-everywhere bag for weight-conscious backpackers. At 1-lb, 12-oz, the Cal 13 features InsoTect Flow vertical baffles, an ultralight jacket-style hood, 40 inch zipper, and 10D nylon ripstop shell and liner to shave weight.Read more
Simply put, DriDown represents the evolution of down insulation. Regular down is treated with a molecular level polymer to create a hydrophobic finish on each individual down plume. This finish allows DriDown to stay dry longer, loft better, and dry faster than untreated down, keeping you warmer in any environment.