Kids' Smith Optics Wilder Jr. MIPS Bike Helmet 71673643379 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 MIPS® 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™ 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. Features Performance comfort lining AirEvac™ ventilation system integrates with Smith goggles and eyewear for fog-free lenses Lightweight, low-bulk single layer webbing Weight: (Size XS, MIPS®):10oz / 270g Lightweight in-mold construction Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head 20 fixed vents for consistent airflow VaporFit™ dial adjustment system offers 270-degree fit adjustment with the turn of a dial Integrated visor Designed for ultimate integration with Smith performance eyewear and goggles for maximum comfort,venting and storage convenience Kids' Smith Optics Wilder Jr. MIPS Bike Helmet