ADVANCED SAFETY DESIGN: Essential among mountain bike accessories, this helmet uses dense EPS foam and in-mold polycarbonate shell, absorbing impact energy to protect you during tough rides SUPERIOR VENTILATION SYSTEM: These bike helmets for adults feature 14 strategically placed airflow vents to keep you cool and comfortable during intense climbs and long-distance adventures CUSTOMIZABLE COMFORT FIT: Ideal as a women's bike helmet, the ErgoKnob dial system lets you adjust the fit precisely to your head shape, while removable padding wicks away sweat for lasting comfort VERSATILE SUN PROTECTION: This adult bicycle helmet has an adjustable, detachable visor that shields eyes from harsh sunlight and debris, ensuring clear vision while riding tough mountain trails EASY MAINTENANCE DESIGN: This mountain bike helmet has removable, washable padding that stays fresh ride after ride, while the lightweight build prevents neck strain during long adventures