Circumference: 54cm Adjustable Fabric: 100% polyester *Sunscreen (spray or cream) can affect the condition of your cap. It is very important to remove the cap from the head when applying sun protection. About the brand Rip Curl is a company built by surfers for surfers, that has been market leaders in surfing for over 50 years. It has been at the forefront of the surf and snow scenes since its creation, which is reflected in their product line.