Highly compressible and extremely warm, the Boy's Down Sweater from Patagonia uses high quality 600-fill duck down. Modeled after the adult version, this boys jacket is the perfect layer under any shell or can be worn on its own. Both wind and water resistant, the Down Sweater has two zippered hand-warmer pockets and a drawcord hem to adjust the fit. Features: The windproof shell is made of polyester mini-ripstop with a DWR (durable water repellent) finish. Fabrics are bluesign(R) approved Traceable Down is compressible and warm; quilt-through construction keeps down in place Full zip-through stand-up collar; internal wind flap and zipper garage Two zippered hand-warmer pockets with reflective webbing pulls; spandex cuff binding and internal cuff gaiter keeps cold out; internal drawcord at hem Can be worn as a mid-layer underneath a shell Hand-me-down ID label Weight: 289 g (10.2 oz) Regular Fit Materials: Shell: 1.6oz 30-denier 100% recycled polyester mini-ripstop Lining: 2.2oz 100% polyester plain weave Both with a DWR (durable water repellent) finish Insulation: 600-fill-power Traceable Down (duck down traced from parent farm to apparel factory to help ensure the birds that supply it are not force-fed or live-plucked. Lining fabric is certified as bluesign(R) approved