Designed to maintain core warmth, the Patagonia Down Sweater Vest features high-loft, 800-fill Traceable Down insulation, which traps that hard-earned heat and promotes effortless temperature regulation. Additionally, the Traceable Down is certified by NSF (an independent third party) and is derived from geese that are never force-fed or live-plucked. A durable shell protects the down insulation from abrasive obstacles and daily wear, while the DWR treatment fends off light moisture build-up and precipitation. Meanwhile, an adjustable hem seals in warmth, and the contoured, slim fit provides a flattering, chic fit. So whether we're perusing the winter farmer's market in search of fresh greens or settling in for a long day of work at the computer, the Down Sweater Vest assures dependable style and warmth.