Ogallala Hypodown Harvester 600-fill Down Arctic Comforter, Twin 68-Inch by 88-Inch 100% Unbleached Cotton Made in the USA and Imported 600-fill Hypodown White Duck 600-fill Hypodown White Duck is made up of 70% White Duck down, and 30% Syriaca Clusters (Milkweed Fiber) Arctic (Very Warm) Syriaca is not a synthetic, nor is it used as a down filler