Waterproof Material: Our shower cap is made of soft polyester fabric with a waterproof PEVA lining, making it reusable and waterproof. Double-Layer Shower Cap: As a shower product for women, our shower cap features a double-layer design. The inner layer is made of waterproof PEVA material to prevent hair from getting wet during showering; the outer layer is made of delicate polyester material to keep hairstyles in place. This shower cap is both stylish and practical. Practical Uses: This protective shower cap can protect hair during showering, keep hair dry during bathing, prevent hair from coming into contact with oil fumes during cleaning and cooking, and can also be used to tie up hair when applying makeup and washing your face. It can also be used in places like spas. Adjustable Shower Cap: The flat diameter is approximately 27 cm (10.6 inches). The shower cap comes with an elastic band to ensure a secure fit and prevent slipping. Suitable for adults, children, teenage girls, and women, it is lightweight, portable, foldable, and easy to travel with. 4-pack Waterproof Reusable Shower Caps, Elastic Shower Caps, Double Layer Hair Caps, Shower Cap Product Description Waterproof Material: Our shower caps are made of soft polyester fabric with a waterproof PEVA lining, making them reusable and waterproof. Double-Layer Design: As a shower product for women, our shower caps feature a double-layer design. The inner layer is made of waterproof PEVA material to prevent hair from getting wet during showering; the outer layer is made of delicate polyester fabric, allowing for styling and a neat appearance. Practical Functions: This protective shower cap can be used to protect hair during showering, keep it dry, and prevent it from coming into contact with oil fumes during cleaning and cooking. It can also be used to tie up hair during makeup application, face washing, and spa treatments. Adjustable Size: The shower cap has a flat diameter of approximately 27 cm (10.6 inches). The shower cap comes with an elastic band to ensure a secure fit and prevent slipping. Suitable for adults, children, teenage girls, and women, lightweight, portable, foldable, and easy to travel with. Material: Outer layer is polyester, inner lining is PEVA. Color: As shown in the picture. Package Contents: 4 shower caps. Only the content listed above is included; no other products are included. Note: Due to differences in lighting and screen settings, the color of the photograph may differ slightly from the actual product. Measurement error is allowed within +/- 1-3 cm.