Bern Summer Children's Helmet, Jr. Nino Kids Sport Bike Helmet with Visor 20 1/4 - 21 1/2 in Zip mold liquid foam technology offers a thinner profile than the standard EPS grey foam other brands use, giving you a much smaller helmet shape Flip Visor gives you on the fly capability to deflect elements or increase your hipster style - depending on what you are gunning for Meets Safety Certification ASTM F 2040, CPSC and EN 1078 and WINTER UPGRADE KIT AVAILABLE SEPARATELY