1. 26 ventilation holes for rapid heat dissipation, one-piece construction effectively reduces wind resistance 2. Lightweight PC shell minimizes fatigue on head and neck during extended wear, enhances structural strength for impact resistance and safe riding 3. Surrounding chin pad with eco-friendly, heat-pressed antibacterial and deodorizing fabric. Double-layered design for softness and comfortable fit 4. Floating adjustment system with three settings: top, middle, and bottom. Customizable to head shape for optimal comfort 5. Dual-layer positioning balance straps for secure fit 6. Eco-friendly, heat-pressed antibacterial odor-resistant fabric lining extends longevity and reduces replacement needs 7. 360° head circumference adjustment knob with ergonomic design for precise, comfortable fit 8. Materials: PC shell + high-density EPS foam 9. Head circumference range: 58-61cm 10. Size: about 27 x 22.5 x 15cm 11. Weight: about 327g
