The Smith Glide Jr. helmet offers the widest youth size range of any model in our line. Its lightweight design includes the advanced impact protection of MIPSA(R). An intuitive dial control adjusts fit, and a super-soft liner adds warmth. Fixed vents keep air the flowing for fog-free goggles. Product Details:- Protection Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that&';s lightweight and durable MIPSA(R) Brain Protection System reduces rotational forces caused by angled impacts to the head Certification: ASTM F 2040, CE EN 1077:2007 CLASS B Fit / Integration Adjustable dial fit for easy, on-the-go size adjustment Designed for ultimate integration with Smith goggles for maximum comfort and venting AirEvac(TM) ventilation system integrates with Smith goggles for fog-free lenses Features Fixed vents for consistent airflow Plush, fuzzy lining adds warmth and comfort Removable goggle strap lock for streamlined shell when goggles are worn under helmet