Certified by Oeko-Tex standard 100 – class I, Crown Goose products go through 14 cleansing cycles and have 1000mm+ turbidity, confirming the cleanliness of our down product. Down 90%, Feather 10%. 100 Cotton Downproof Satin Fabric. 875 FP (fill power, which is a measure of "fluffiness" of a down product. The higher the FP the more air an ounce of the down can trap, thus the more insulating ability the down has. Available in four weights - 350 g, 12 oz(Cool) 600 g, 21 oz (Medium) 900 g, 32 oz(Warm) 1200 g, 42 oz(Very Warm).