Bluecell multifunctional flap cap is made from 100% polyester. It.s free size can fit with most of people with adjustable buckle. Attach with string closure to fasten your cap from wind. The attached sun shield and mask of UV 50+ can protect your neck and face from sunburn and dust comprehensively. All of the attachment on the cap can be removed when not need. All in all, you can have a cool journey with our multifunctional flap cap.