Patagonia Jackets - Patagonia Down Shirt Jacket - Electron Blue :: Men > Jackets. Jacket Shell: Windproof and lightweight recycled polyester shell and liner fabricsZips: Front Vislon zipper with interior storm flap and chin guardPockets: Two internal pockets. created by the external hand pocket constructionPackable: Jacket stows in either hand pocketCuff Details: Reinforced quilting for added structureHem Details: Reinforced quilting to hemInsulation: 600-fill-power 100% Traceable Down with a narrow quilting constructionShell has a DWR (Durable Water Repellent) finish Size: X-Large,Medium,Small.