Restful Nights Down Surround Xtra-Firm Density Pillow - SSTD True Loft Feathers. Inner core of springy, high loft feathers provide superior all-natural comfort and support 525 Fill Power White Duck Down. Outer layer of silky soft down for all-natural, lasting cushioning and comfort Extra Firm support for side sleepers 300 thread count for all-natural softness Super Standard 18.5" x 26.5" x 1.5"