Fit and size: Diameter is approximately 40 cm, making this silk satin bonnet suitable for most head shapes. It fits long, short, curly, or straight hair comfortably. To maintain the bonnet's shape and extend its life, avoid machine washing; hand washing and natural air drying are recommended. Hair protection benefits: The satin material reduces friction, helping to preserve natural oils and promote healthier hair. It helps retain moisture, prevent dryness, frizz, and tangles, and adds shine, contributing to an overall healthier look and feel for your hair. Material and construction: Made from extremely smooth, soft, and breathable satin. This creates a silky feel against your hair, minimizes friction with the pillow, and helps prevent dryness, split ends, hair breakage, and night hair loss, leaving your hair looking shinier and more vibrant. Comfort and fit: The bonnet features two long straps so it can be worn securely in place even as you move during sleep. A widebrimmed elastic band wraps around your hair without pulling on your forehead, ensuring a comfortable fit all night. Use scenarios: Overnight protection: Wear while sleeping to reduce friction and minimize breakage for all hair types. Moisture retention: Use after washing or conditioning to help lock in moisture and reduce frizz. Travel or spa use: Ideal for keeping hair neatly covered during travel or while applying hair treatments without disrupting styling.