Design & Technology: 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 MIPS(R) Brain Protection System reduces rotational forces caused by angled impacts to the head for added protection 21 fixed vents offer consistent airflow Performance comfort lining offers optimal comfort Lightweight, low-bulk single layer webbing Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older Weight: 8 oz. Style: ZIPJRMIPS