Child/Youth(Ages 5-13) helmet in sports of Biking,Skating,Scooter,Roller,Etc. Material: EPS& IN-MOLD EPS shell Sizing: 19.68"-22.44"(50-57cm) Package: 1 X helmet with visor Warranty If you find this helmet gets quality problem within 180 days after you purchase,we are responsible for replacement for free or refund fully.