Down comforter, semi-double 8-piece set, Japanese style, 90% Polish white duck feathers, Royal Gold Label ◆Guaranteed quality feathers with the five-star Royal Gold Label◆ It uses a luxurious 90% high-quality Polish white duck down. Poland, the world's finest producer Poland, a frigid country, is widely known as a producer of high-quality feathers. Ducks raised in these harsh climatic conditions have large down balls and retain high-quality down with excellent heat retention. It is because they have endured the cold and grown up on vast ranches surrounded by nature that they are able to offer such an exquisite sense of warmth.