The MET Hooray is a new angle on the children's helmet that is packed with features that enhance your children's safety and give you peace of mind that you have done your best to protect them. The MIPS version is equipped with an internal brain protection system. improved EPS construction makes the helmet safer MIPS brain protection integrated rear LED MET light for extended head coverage and more comfortable wearing clamp buckle design with anti-opening lock ergonomic design for use with child seat Bimbi safety system for fontanelle protection integrated helmet visor for added safety insect screen in frontal vents size XS (46-52cm), S (52-56)