Our Cosy Extreme Womens Short Down Jacket is made of 100% polyester fabric with an 80% down and 20% feather padding. It has a water-resistant outer, making it ideal for winter weather conditions. With practical front pockets to carry the essentials and an adjustable hood for extra protection, this jacket would be perfect for any outdoor occasion. Fill Power Rating 600 - Higher fill power = warmer item. The measure of the loft (fluffiness). The higher the rating, the more air trapped per ounce of down allowing a higher level of insulationWater-resistant - Treated with durable water repellent (DWR), droplets will bead and roll off the fabric. Ideal for Light rain, or limited exposure to rain