DOUBLE-LAYER, DURABLE, ANTI-FRizz: Our shower caps and shower caps feature an improved double-layer design, with the outer layer being waterproof and the inner layer made of high-quality satin, which is more durable and breathable than a single layer. The inner satin layer reduces frizz in the shower and helps maintain blowouts, natural curls, or any hairstyle. LARGE ADJUSTABLE SIZE TO FIT MOST HAIR AND HEADS: This beautiful shower cap features an adjustable elastic band up to 14.5 inches in diameter, ensuring it will fit all head sizes. Fits head circumference 20-30 inches. Suitable for adults and children, long and curly hair. Wide Application: The reusable shower cap is practical and stylish, easy to dry and easy to carry. It can protect your hair in many places. You'll need it when you wash your face, apply makeup, travel, spa and at home. It also makes a thoughtful gift for birthdays, holidays, Mother's Day and Christmas.