Size S-M, Head circumference 51-54cm It offers all the protection, lightness, and versatility a rider needs to ride long distances with confidence. The Linea 03 half-shell MTB helmet offers ideal versatility, lightness, and safety, allowing you to tackle any trail with complete control. It provides greater protection by combining a polycarbonate outer shell with a dual-density EPS inner shell mapped to the areas of the skull most susceptible to impact. Weighing a total of 340g (size M), it has an advanced construction that meets all international standards: CPSC 1203, CE EN1078, and AS/NZ 2063. The improved comfort provided by the soft, thermoformed lining with antibacterial and deodorizing treatment allows riders to focus solely on their ride and ride without being affected even over very long distances. The 18 vents located throughout the shell provide optimal ventilation and breathability in all phases of activity and weather conditions. The rear design of the shell allows for ponytails and braids to pass through. Practical and secure, the angle-adjustable peak, which can be operated with one hand while wearing gloves, ensures perfect visibility on any route and in any condition.