Not necessarily. While fill power is a great metric for comparing down products, it doesn’t tell the full story. In addition to fill power, you’ll need to look at the composition of the down (the ratio of down cluster or down plumage to feathers or quills) and fill weight (how much down, by weight, is physically added to a particular product). Higher quality products will contain down with a higher ratio of down to feathers, and warmer products will contain more down.