A GUIDE TO FILL POWER
What Is Fill Power?
Fill power is a number that measures the fluffiness and quality of a down product. Fill power measures the amount of space one ounce of down will occupy in cubic inches. Higher fill power means the down will have better quality, higher loft, and will retain its firmness longer. This is because higher fill power means the down can trap more air which allows for greater insulation. Common fill power measurements include 650, 750, 800 & 850.
Our Fill Power Chart:
Each of the cylinders below contain only one (1) ounce of down. As fill power increases, the down can trap more air which, in turn, allows more insulation from the down.
For example, one (1) ounce of 800 fill power goose down will loft to 800 cubic inches. So 850 fill power will 'bloom' or 'loft' higher than 800 fill power. The higher the fill power the larger the down cluster. Larger down clusters will loft higher; sleep softer, last longer and sleep warmer.
Fill power vs fill weight?
Fill weight is the number ounces of down inside the pillow shell. Fill power is the size and quality of the down used to fill the shell. It's that simple.