adjustable braces and quick-release loop, Back part adjustable to ensure tight fit * Details : Straps * Age : Age 2 and upwards * Fabrics : ABS moulded by injecting hard plastic * Size S : 48-52 cm Size M : 53-58 cm * Conforms to CE standards, Conforms to EN1078 standards, Conforms to ASTM F1447 standards, Conforms to AS-NZS 2063 bike and helmet standards