If you are a certified downhill thrill seeker you will need the protection that keeps pace while you push your limits. This High-performance downhill style full face mountain bike helmet offers the ultimate protection, aimed at the elite, but useful for anyone who wants to improve their level of safety on the bike. The MT500 features an integrated Koroyd® technology core for superior energy absorption whilst keeping the weight competitively low (only 680g for the largest size). Key Features > High performance downhill style full face mountain bike helmet, compatible with goggles > Full integrated Koroyd® core for superior energy absorption > Large vents including top \\\"air intake\\\" zone and large diameter Koroyd tubes for increased airflow > One-hand micro-adjustment fit system > Antibacterial, fast wicking padding > Light weight, improving your endurance and mobility: S/M: 520g, M/L: 580g, L/XL: 680g