Bundle up in the Columbia Sportswear Women's Delta Ridge II Down Jacket. Its shell is made of 100% polyester. The 650 Fill Power Down insulation is RDS certified, and its Omni-Heatâ⢠thermal reflective retains heat. The Omni-Shieldâ⢠technology repels wind and water. Columbia Sportswear Women's Delta Ridge II Down Jacket Black, Medium - Women's Ski Outerwear at Academy Sports