Protection: Lightweight In-moId construction. Fit: Self-adjusting lifestyle fit system flexes to match your head shape for maximum comfort. Integration: AirEvac ventilation system integrates with Smith goggles and eyewear for fog-free lenses. Features: Two vents for airflow. Lightweight, low-bulk single layer webbing. Weight and Certifications: Weight (Size M): 9.52 oz / 270 g. CPSC and CE EN 1078 certified. Cruising around the neighborhood or skill-building at the local bike park, the Smith Maze bike helmet keeps your look casual and sets a good example for your kiddo while you're at it. Through cool mornings or sunny afternoons, the lightweight build and two-vent front keeps you comfortable. Buckle up and show your kid what the wheelie gene looks like.