The North Face ThermoBall Full Zip Jacket - Women's If you want the warmth and comfort of a lightweight down jacket, but need one that will work in damp weather, try The North Face Thermoball Women's Hoodie. Thermoball is a synthetic insulation, so (unlike down) it will still provide warmth if the dampness seeps in. It has the structure of down, though, so it provides a ton or warmth for its weight. You can easily stow the highly compressible ThermoBall Hoodie in your pack; it stuffs all the way down into one of its pockets. When conditions call for a full layering system, this hoodies active fit is perfectly tailored to fit comfortably under a shell jacket. 100% polyester ripstop fabric Center Back Measures: 26 PrimaLoft ThermoBall insulation for lightweight warmth DWR provides water-resistance Provides phenomenal warmth in cold conditions Attached, adjustable hood for weather protection Exterior zippered pockets at hips Hem drawcord cinches to seal out cold air Packs down into pocket for easy stowing New improved fit for more feminine shape