This down jacket is made using Montbell’s superior techniques and materials. It uses 1000 fill power down, the highest quality down in the world, and an ultra-thin shell that is both ultra-lightweight and durable. Every small component and even the quilting pattern was given consideration in the design process to make the lightest jacket possible. Its compactness defies conventional wisdom regarding insulated clothing, allowing you experience Montbell's philosophy of "Light & Fast" first hand.