Why ZIMASILK Silk Sleep Cap? - Made with soft and smooth silk material. - Reduces your bed head and stops your hair from drying out. - Allows your expensive hairstyles to glide over the pillow and retain their shape. - Great for sufferers of common allergic reactions such as itchy skin. - Aids blood circulation and digestion. Why Silk: Natural mulberry silk is of many wonderful skin healing and health promoting properties. It is also called the "queen of natural fiber". Modern science has proven that it is 98% of protein containing 19 amino acids. It is the oldest natural fiber been used as surgical internal sewing thread, and it works a wonder for people with burnt skin and eczema on clinical trials. Silk Care Instruction Hand wash, or machine wash cold in delicate cycle, separately from other items. Hang dry, or cold air machine dry. Please do not expose silk under the strong sun.