The Restful Nights Trillium pillow contains blown gel polyester fiber. Trillium pillows are perfect substitutes for down and feather pillows. These gel polyester fiber pillows are can be shaped however you want them and will retain their shape night after night, because the polyester filling these pillows are extremely resilient. These options make the Trillium pillow perfect for anyone who desires a soft pillow which they can shape. This line of polyester pillows also features a 230 thread count fabric. This strong fabric will ensure that the Trillium gel polyester fiber pillow is extremely durable and will have a long life. Budle Includes Pillowtex Pilllow Protector(s)!