Columbia Women's Gold 650 TurboDown Down Jacket 100% Nylon 100% Nylon Shell - Tough and durable while being very light and attractive, the nylon shell of this down jacket makes it a true winner. Poly Fill - A more eco-friendly type of down filling, the filling of this jacket is 100% polyester, so it's very light and comfortable while still being warm. Water Resistant - The nylon shell of this jacket acts like a windbreaker against the heavy winds, while also repelling water away to keep you dry. Omni-Head Reflective Fill - The reason this jacket is so warm is that the poly inside is Omni-Heat Reflective, which means it keeps the body heat trapped inside for a cozy temperature without overheating. Classic Down - While the filling might be synthetic, everything else about this jacket was made in a classic down style.