Nobody likes falling in the middle of a sick run, but at least you'll be ready for it with the awesome Bern Nino helmet! ; Proprietary Zip Mold construction for kids. Bern's exclusive Zipmold foam is a liquid foam injection process that provides a better weight to strength ratio, creating a lighter, lower profile helmet. Complies with CPSC, ASTMF 2040, and EN 1078 standards for bike and skate. Ventilation holes for added breathability. Split style strap for a custom fit. All Season interchangeable liner system allows you to customize your helmet with up to six different configurations. Additional liners not included. Imported. Measurements: ; Circumference: 20 in ; Product measurements were taken using size XS/SM (48-51.5 CM Circumference). Please note that measurements may vary by size.