Ride and stay safe in style with the new Flybar Helmets. Tested for bicycling, longboarding, roller and in-line skating, aggressive/trick skateboarding & even with one of our pogo sticks. Features of the Flybar Helmets: Made with a strong ABS Outer shell and a thick black EPS foam liner making it lightweight and able to withstand impact keeping you safe and protected. 12 vents on the outside of the whole helmet not only look great, but will provide airflow throughout the helmet and help keep you cool. Soft padded chin strap for added comfort. Keep the strap nice and snug on your chin without it irritating you. Comes in 3 different sizes to fit your size head: S/M (53-55cm/20.8-21.6in), M/L (55-58cm/21.6- 22.8in), L/XL (58-61cm/22.8-24in). Perfectly adjust the helmet with the dial on the back to ensure a proper fit. Measure the circumference of your head from the middle of your forehead so you know what size is perfect for you. Feel safe and secure with the new Flybar Helmets!