Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable. Zonal KOROYD® coverage for lightweight, energy-absorbing and ventilated impact protection Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head Designed for ultimate integration with Smith goggles for maximum comfort and venting AirEvac ventilation system integrates with Smith goggles for fog-free lenses Grow With Me dual-stage liner system adapts to growing kids Adjustable dial fit for easy, on-the-go size adjustment Smith Prospect Mips Helmet Junior