The Brooks Down Sweater conquers cold with packable backcountry insulation. Weighing just 10.9 ounces, this ultralight layer utilizes 100 grams of DWR-treated, 800-fill power, 37.5-DownTek to actively fight off moisture. It delivers best-in-class warmth without sacrificing weight, containing 50% more down than similar products. The design incorporates a drop-tail hem for extensive coverage, along with a one-hand operable Turret hood that locks in heat while maintaining the field of view.