Windproof, water-resistant and warm, the Boys' Nano Puff Jacket is an every-season stalwart, performing yeoman service as an outer layer in cool weather and as an insulating midlayer when things get really cold. Its tear-resistant fabric, made of 20-denier polyester mini-ripstop, has a DWR (durable water repellent) finish to shed rain; polyester plain weave fabric lining is bluesign approved. A carefully designed quilt pattern holds the lightweight and compressible 60-g PrimaLoft Gold insulation in place for long-lasting wear. Zippered handwarmers (with reflective webbing pulls) and a tall collar provide additional protection. Other details include an internal wind flap behind the front zipper, spandex binding at the sleeve openings, adjustable drawcord hem, internal zippered chest pocket (that doubles as a stuffsack) and a hand-me-down ID label.