Design & Technology: Trail bike helmet developed for downhill trails MIPS(R) Brain Protection System reduces rotational forces caused by angled impacts to the head for added protection AirEvac(TM) ventilation system integrates with Smith(R) goggles and eyewear for fog-free vision Hybrid X-Static(R) / Ionic+(R) antimicrobial lining offer sweat-activated odor control to keep you smelling fresh Complete Koroyd(R) coverage for lightweight, energy-absorbing and ventilated impact protection Three washable cheek pad kits, two crown liners, and two neck rolls let you customize your fit 21 fixed vents offer consistent airflow D-ring chin strap fastener creates a snug fit Adjustable visor gives you control of your angle Designed for total integration with Smith(R) performance eyewear for increased comfort, venting, and convenience Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older Weight: 27 oz. Style: MAINLINEMIPS