When your young rider is dedicated to the dirt, you need gear that keeps pace with their skill set. The Smith Wilder Jr. mountain bike helmet combines the enhanced angle impact protection of MIPSA(R) with a lightweight, ventilated design just like our adult helmets. 21 fixed vents keep the air flowing as kids bomb down their favorite trails. Our VaporFit(TM) dial system adjusts around the head with the turn of a dial to get the right fit every time. There&';s a built-in visor to cut glare and integrated sunglasses storage, so kids can stow their glasses just like mom or dad. Product Details Protection Lightweight in-mold construction MIPSA(R) Brain Protection System reduces rotational forces caused by angled impacts to the head Fit / Integration VaporFit(TM) dial adjustment system offers 270-degree fit adjustment with the turn of a dial Designed for ultimate integration with Smith performance eyewear and goggles for maximum comfort,venting and storage convenience AirEvac(TM) ventilation system integrates with Smith goggles and eyewear for fog-free lenses Features 20 fixed vents for consistent airflow Integrated visor Performance comfort lining Lightweight, low-bulk single layer webbing Weight: (Size XS, MIPSA(R)):10oz / 270g