The SILX silk-filled pillow is the perfect alternative to down, cotton, wool or any other pillow filling. It is 100% natural, hypoallergenic and inhospitable to dustmites. The silk-fibers inside the pillow are long strands of mulberry silk. The silk fibers come from mulberry silk cocoons and have the length of about 1,300 feet. Silk fibers are the strongest natural fiber and also a natural fire retardant. It is half the weight of down and drapes to your body eliminating cold spots. Due to its low moisture retention, the silk-filled pillow is also mildew resistant. The hand-stretched silk batting never wanders or bunches. Silk fibers are composed of 18 amino acids which are similar to and found in the human skin. The silk pillow is covered with a 260 thread count cotton cover.Hypoallergenic Inhospitable to dust mites 100% natural Silk is temperate, great all year round 18 essential amino acids are beneficial to the skin, hair, and joint pain{Pillow sizes: Boudoir: 16 x 12 Queen: 28 x 20 King: 36 x 20 {Weight: Boudoir: 10 oz Queen: 31 oz King: 36 oz Boudoir (Extra Fill) : 15 oz Queen (Extra Fill): 50 oz King (Extra Fill): 60 oz