Design & Technology: MIPS(R) Brain Protection System reduces rotational forces caused by angled impacts to the head for added protection VaporFit(TM) dial adjustment system offers 270deg fit adjustment with the turn of a dial AirEvac(TM) ventilation system integrates with Smith(R) goggles for fog-free lenses Complete Koroyd(R) coverage for lightweight, energy-absorbing and ventilated impact protection 18 fixed vents offer consistent airflow Integrated skeletal structure creates a roll cage for added strength and impact protection Ionic+(R) antimicrobial lining offers sweat-activated odor control for maximum comfort Side channels let you securely stash your sunglasses when not in use Lightweight, low-bulk single layer webbing 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: 10 oz. Style: TRACEMIPS