"This Lixada mountain bike helmet seeks ultra-lightweight construction, ample ventilation, comfort wearing and streamline shape for reducing resistance all of which make it one-of-a-kind helmet for mountain biking, trail cycling! It also Features an in-mold PC shell and EPS liner integration for amazing impact protection, with the fit adjustment in wheel to make it feel snug, Y-shape adjustable fixing strap and breathable soft chin guard. Features: Integrated in-mold PC shell with multi-dimensional cone-shape EPS impact foam. Ventilated channel system with13 vents provide cooling airflow when you’re riding hard. One-hand Fit adjustment back wheel for comfort wearing, suitable for head circumference 22.0 - 24.4 inch. Removable inner quality padding to absorb shocks upon impact and extra sweat. Breathable, removable and soft chin guard and Y-S fixing strap for comfort fit. Visor attached protects your eye from rain, sun, mud, and tree branches. Specially designed for mountain biking, scootering, trail cycling, riding. Note: Please do not apply it on motor vehicles. Specifications: Brand: Lixada Color: Matt Black / Blue+Yellow / Yellow + Black + Red / Blue + Red + White / White / Red / Red + Black / Blue + Black / Dark Green + Black / Yellow + Black (Optional) Material: EPS & PC Vents: 13 Head circumference: 56-62cm / 22.0 - 24.4in Net weight: Approx. 361g / 12.8oz Package size: Approx. 26 * 22 * 20cm / 10.2 * 8.7 * 7.9in Package weight: Approx. 390g / 13.7oz Package List: 1 * Lixada Helmet"