Fill power is defined as the estimation of the quality of Down in a quilt. Increase in Fill power will lead to a higher rate of fluffiness of a quilt. The Fill power also justifies the rate of warmth and its quality.
To understand the concept of Fill power, here are some examples that will help you in deciding the best quilt for your requirement:
Up to 400 - Light warmth
400 - 599 - All Seasons warmth