Product<br> CE Kids Bike Helmet 50-58cm Ultra Light Children Cycling Helmet City Road Bicycle Kid Helmet For Outdoor Sports Riding Skating Scooter<br> Specifications:<br> Size (Approx.): S (50-54cm / 19.69-21.26in), M (54-58cm / 21.26-22.83in)<br> Material: (shell) imported green PC material + (the main body) imported EPS foam<br> Product Features:<br> 1. It is compatible with for MTB and road bikes for kids.<br> 2. It has passed CE/CPSC/SGS Certification.<br> 3. It has passed the safety test.<br> 4. The EPS foam was thickened.<br> Advantages:<br> It features good ventilation function with air holes and good protective performance, therefore it was specially designed for the endurance racing athlete kids.<br> The inner EPS shock-release system was put in. We use the aramid filament to enhance the strength.