Luxury White Goose Down Comforter. Luxurious 330TC 100% Cotton Sateen cover filled with 700 Fill Power European White Goose Down. The down used in this product has been certified to the RDS standard by Control Union. Available in summer weight and all season weight. Double stitched edge piping ensures strength and durability for years to come. Corner loops provide an easy way to tie a duvet cover on and keep it in place!