From Peacock Alley, the Silk Filled Pillow Enhancer features: These pillow enhancers are filled with 100% premium mulberry silk floss and enclosed in a soft cotton shell, providing the ultimate comfort and support for a restful night's sleep. With its hypoallergenic properties, this enhancer is perfect for those with allergies, asthma, or sensitive skin Filled with 100% long strand mulberry silk Covered in a 100% cotton outer shell Mulberry silk is hypoallergenic and improves sleep hygiene Standard approx. 20" x 26"  King approx. 20" x 36"  Removable cover  Zipper closure  Naturally thermoregulating and helps maintain body temperature Dry clean only Imported.