Our kids' helmets have 6 battery-powered rear LEDs, which flash in 3 different modes for extra visibility and safety. You can easily adjust the size of our helmets for kids using the rear knob. Our helmets also come with 7mm sealed pads, a chin pad, and adjustable straps on an 11 air vent helmet design to ensure a comfy fit for hours. Our children's helmets now come with extra safety features and a comfy chin pad in a new size (XS-S; 48-53cm), for kids to safely enjoy riding for hours on their matching scooters and go bikes.