Similar to North Face's Thunder Jacket, the Women's Diez Jacket takes the down sweater idea to the next level by incorporating 900 fill down and Pertex 10 denier nylon ripstop fabric, the lightest down-proof fabric on the market. At just over 8 ounces, there will never be a reason to leave the Women's Diez Jacket behind, especially since the jacket stows in the hand pocket. Wear this coat on its own during cold weather or layer it under a shell when you need more durability and waterproof protection.