Made of satin, with smooth surface, soft to touch and breathable to wear, lightweight and no burden to your head, you can use for a long time. Double-layered design, double-sided wearable, features lightweight, breathable and skin-friendly. With a elastic band to keep it in place even when sleeping, and the hat diameter is 36 cm/ 14.2 inch for reference, One size fits for most adults, won't too loose or too tight Not only you can wear it as a sleep , but also a shower . You can wear it for washing face, making up, bathing, even doing the housework, also suitable for cancer patient and hair loss people. Fits for almost all hair, such as natural hair, long hair, curly hair, braids, straight hair, updos, ponytail and so on. Specification: Type: Satin Bonnet Style: Elegant Material: Satin Color: Black, Blue, Wine red, Khaki Size: Approx. 36 x36x1cm/14.2x14.2x0.4 inch (One size fits for most adults) Package Includes: 1 * Reversible Satin Bonnet Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you