Louis Garneau Diamond Helmet Red/White, L 40 vents. Evacuation channels: Internal channels provide better airflow and evacuate moisture and heat Spiderlock Elite: Adjustable and detachable rack-and-pinion mechanism using only one hand to stabilize the helmet on the head. It is provided with ergonomic padding Super MSB Technology: Ring-shaped protection at the base of the helmet reinforces the perimeter for enhanced protection Composite Reinforcement: Lightweight composite skeleton provides structural support and integrity on impact Weight: 10.1 oz/285 g. Certifications: CPSC-ASTM-CEN-AS 2063*(*Order 1408847 for Australian certification)