Adjustable Clasp for Secure Fit: The sleeping bonnet features an elastic band at the back of the head with an adjustable clasp, ensuring a secure fit and reducing the risk of slipping during sleep. The design prevents lines or marks on the face, and the clasp is suitable for head circumferences of 20.9-24.5". Hair Protection with Silk Satin: Made from silk satin material, the bonnet offers a soft and comfortable sleeping experience. Its breathable design allows for airflow, preventing scalp overheating and greasy hair. The bonnet reduces friction between hair and the pillow, minimizing curling and tangling. It helps maintain hair moisture, preventing dryness and breakage, making it suitable for various hair types. Versatile Usage Scenarios: Ideal for sleeping to prevent flattened hair and facial marks. Also suitable for picnics, face washing, applying face masks, essential oil maintenance, makeup removal, household chores, and windy days to keep hair away from the face. It's even effective during baby-carrying to prevent the child from grabbing your hair. Royal Luxurious Style: The bonnet boasts a beautiful design with a royal luxurious style, making you feel confident and beautiful like a queen. The double-layered construction enhances hair protection. It is colorfast and won't stain pillows or bed sheets. Suitable for women of various age groups and can be worn throughout the year. Care Instructions and Guarantee: It's recommended to hand wash or machine wash the bonnet with a neutral detergent in cold water before wearing. Avoid bleach, lay flat or hang to dry, and keep it away from direct sunlight. These care instructions ensure the longevity of the bonnet. The product comes with a guarantee for your satisfaction.