This THOMAS COOK WOMENS OBERON Jacket boasts a 100% polyester outer shell, 100% nylon lining, and 80% down and 20% feather fill for superior warmth. Despite its ultra-lightweight design, it still provides exceptional insulation. Plus, with welt pockets and internal zip pockets, you'll have plenty of storage options. The elastic bound arm holes and body hems ensure a snug fit that locks in heat for added comfort in any weather.