Smooth Sides: The adjustable sleep cap uses a double layer of soft satin with a smooth inner surface to reduce frizz and dryness of hair at night. Drawstring Fit: The shower cap features a drawstring that you can loosen or tighten to fit your head comfortably and securely. Reduced Friction: The double layer minimizes friction, helping keep hair soft and protected all night. Supports Better Results: Wear after treating damaged hair and applying heat styling products or hair oil every night to help improve results. Waterproof Design: This cap is designed to be waterproof, providing versatile use for hair protection in different conditions. Use scenarios Night care routine: After applying hair oil, serum, or undergoing a damagedhair treatment, wear the cap at night to support and enhance results. Shower or bath protection: Wear the waterproof cap in the shower or during bath time to keep hair dry and protected. Travel or daily protection: Use during overnight trips or on busy days to maintain hair health and prevent frizz while you sleep or move between activities. Material and fit details Outer layer: soft satin; inner layer: smooth material for gentle contact with hair Construction: double layer for reduced friction and added protection Closure: adjustable drawstring for secure fit