Gerbing's Gyde 7 volt Calor Hybrid(Puffer,Front only)Jacket-Womens-Black-Large Ultra-light and extremely warm garment Water-resistant/windproof fabric. Polartec  Power Stretch Pro fleece back and sleeves for added mobility 278 grams of synthetic insulation fill in front body Five Microwire heating zones: collar and chest (4) Reaches temperature of 135 degrees F