The Utopia Eiderdown Collection defies fill power-- this extraordinary down is culled from the Eider duck and renowned as the most efficient insulation against cold. Also extremely rare, as down is gathered from empty nests, Sferra has encased it in a 434 thread count 100% silk jacquard. Finished with piped edging, corner loops, and corner silks, the Utopia Eiderdown duvets and pillows are made in the USA from extraordinary and rare imported down and German fabric.