Our Skye Extreme Womens Down Jacket is made of 100% polyester fabric with a down padding. It has a water-resistant outer, making it ideal for winter weather conditions. With practical zipped front pockets to carry the essentials and a stylish design, this jacket is sure to keep you warm on your outdoor winter adventures. 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