Restful Nights Ultraflow Queen Size 2-Pillow Set with 2 Queen Size Pillowtex Pillow Protectors The Ultraflow pillow has been fashioned by Restful Nights with a particular blend of 100% polyester fiber that has a feel much the same as a natural feather pillow. This synthetic product copies natures finest. The Restful Nights Ultraflow pillow contains micro-denier blown cluster polyester fiber that gives it a unique feel. Therefore, this pillow has the feeling of natural material while upholding the positive properties of synthetic materials. Fill - 100% polyester fiber, Fill Weight - 20 ounces, Care Instructions - Machine Wash and Dry, 230 Thread Count, 100% Cotton Cover, Hypoallergenic