This 5 Panel Cap is made out of 100% cotton, which means it’s durable and comfortable. The cap has a nylon strap clip at the back and two metal eyelets on each side. 100% cotton. Soft-structured, five-panel, low-profile cap. Metal eyelets. Nylon strap clip closure. Head circumference: 19⅝″–22½″ (48. 3 cm–55. 9 cm).