This mountain bike helmet complies with CPSC, ASTM F1447, and CE safety standards for reliable protection on trails. Its full‑coverage design combines a tough polycarbonate shell with an impact‑absorbing EPS liner, delivering strong protection without adding heavy weight. Eighteen vents with internal channels keep your head cool over long miles. The padding and chin pad are removable and washable, and the large visor shields against sun, rain, and debris. A simple dial adjustment lets you fine‑tune the fit securely. Available in M (54–58 cm), L (58–61 cm), and XL (61–63 cm), it fits children, teens, and adults of all genders.