Patagonia Men's Bivy Down Jacket Made of bluesign approved 100% nylon canvas with a DWR (durable water repellent) finish on body and yoke; insulated with 100% Traceable Down (600-fill-power duck down that can be traced back to birds that were never force-fed, never live-plucked) Full-length center-front zipper and external storm flap secured with exposed snap closure Two insulated side-entry handwarmer pockets on lower torso; internal zippered chest pocket to keep your essentials secure Shell: 5.5-oz 100% nylon canvas with a DWR (durable water repellent) finish. Yoke: 4.2-oz 100% nylon canvas with a DWR finish. Lining: 2-oz 100% polyester plain weave. Insulation: 100% Traceable Down (600-fill-power duck down that can be traced back to birds that were never force-fed, never live-plucked). Shell and yoke fabrics are bluesign approved Self-fabric cuffs and drop-tail hem