Reliable head defense Durable density PC outer shell built with precision molding and a foam inner layer to reliably absorb collision force and provide fullhead protection. Reduced accident risks Designed for road and mountain biking; includes a threemode lighting feature to enhance nighttime visibility, improving conspicuity and helping to minimize hazards during rides. fit technology Threedirectional adjustments plus a 360degree knob mechanism for a secure, nopressure fit that accommodates a range of head sizes. Heat dissipation technology Multihole ventilation with optimized airflow channels to expel heat and moisture, increasing comfort on hot riding days. Key attributes Function: protective helmet with impact absorption, visibility lighting, adjustable fit, and ventilation. Compatibility and size: designed to fit a range of head sizes via adjustable fit system. Material: density PC outer shell, foam inner layer. Performance: enhanced protection, improved nighttime conspicuity, secure fit, and effective heat management. Use scenarios Nighttime road rides: the threemode lighting increases visibility to other road users, reducing collision risk in lowlight conditions. Mountain biking on technical trails: robust shell and foam liner provide reliable impact absorption on mixed terrain. Daily commuting and training on hot days: efficient ventilation and moisture expulsion maintain comfort during extended use.