This lightly insulated sweater is as cute as it is functional. The outer fabric is nylon taffeta with a water repellant treatment; it blocks the wind, sheds snow, slides nicely under outer layers, and has a nice feel. The body is lined with brushed polyester that wicks moisture and adds warmth while the sleeves are lines with taffeta for easy donning. The insulation is 60-gram microdenier polyester that traps body heat while allowing moisture to escape. Isis takes the Northern Lights to the next level with eight sizes, a great cut that is flattering and the quilt design that holds the insulation in place looks great! This sweater is at home in the backcountry as it is around town. Why shouldn’t high performance gear make you look good too? Outside: 100% nylon taffeta with DWR finish and brushed polyester lining, Inside: Synthetic Insulation