Combining Scott's Toray stretch fabric with Thinsulate insulation & a new athletic fit, the Women's Harper Pnt is a definite nominee for best new style. Features Thinsulate Glossary Thinsulate The original warmth without bulk insulation. Inch for inch no insulation keeps you warmer than Thinsulate Insulation. When you compare equal thicknesses, Thinsulate Insulation provides up to twice the warmth of other high-loft insulating materials & nearly one & a half times the warmth of down.