Our white down comforter is made by a large down cluster that provide a light yet warm high fill power rating. 600 Fill power. Fill Power refers to the measurement of the loft in the down clusters. A higher fill power will give you a lighter, fluffier comforter. Features 14'' Baffled box. The baffled box squares prevent the down from shifting, while creating an even distribution of warmth and maximum loft. 350 thread count.