Our premium ultralight has a streamlined fit that's built for mobility. Comfort is further enhanced with the soft, recycled ripstop polyester shell and its adjustable drawcord hem. But the real crux of this hoodie is the high-loft Premium Goose Down insulation. Maximum warmth. Minimum weight and bulk.As an ultralight insulating layer, the MicroTherm is thinner than traditional down jackets. But that combination of minimal bulk and effective warmth is what makes it special, and is the result of its unique micro-channel construction and the exceptionally high-loft down that it holds close to the body for maximum thermal efficiency.