The Children Cycling Helmet Kellys Zigzag is a stylish and durable helmet intended for the little riders. The 8 air vents were designed to remove excess heat. Thanks to the closure system with a large regulation knob (which can be easily accessed by parents). the Children Cycling Helmet Kellys Zigzag fits perfectly. The comfortable. antibacterial padding does not interfere with ventilation. Last but not least. the reflective components improve the child safety.