1. This youth helmet is suitable for head circumferences of 48-52cm. The strong magnetic buckle design ensures a secure fit that wont loosen, even during intense activity. The Ionic+ negative ion antibacterial lining provides freshness, while the sturdy PC outer shell, EPS foam, and shock-absorbing lining offer multiple layers of protection for childrens safety during sports. 2. 20 ventilation holes provide efficient heat dissipation, improving cooling performance and sweat evaporation. 3. Made with high-density EPS foam and a thickened PC outer shell using integrated molding technology, the helmet structure is more compact, effectively absorbing impact and vibration to protect the head. 4. Floating adjustment system: Three adjustable positions allow for customized comfort based on head shape. 5. Weight: Approximately 257g
