5 panel design. Pre-curved peak. Stitched ventilation eyelets. Child safe secure button. Rip-Strip™ size adjuster. Also avail... 5 panel design. Pre-curved peak. Stitched ventilation eyelets. Child safe secure button. Rip-Strip™ size adjuster. Also available in adult size. Head circumference: 59cm. The visor is made from recycled polythene, which is a tough, light and flexible resin.