Crafted from 100% Pure Mulberry Silk, these elegant bonnets are adjustable and double layered with silk meaning more hydration and benefits for the hair. They are not only aesthetically pleasing but also a great hair care product that helps maintain and revive your hair keeping it soft and hydrated. These caps have been designed to provide a number of hair benefits, few of which include but not limited to, protecting your hair styles, preventing breakgaes, and helping to grow hair and retaining moisture. The material used is 100% double layered silk with stretchy elastic at the back to adjust to different sizes. 100 % SILK In order to maintain the quality of the fabric we advise that you only hand wash this product in cold water and air dry, running a warm steam will remove any creases left. Only use gentle detergent.