School, park, or neighborhood trails, kids and bikes go places. No matter where their wheels take them, the Smith Zip Jr. bike helmet delivers enhanced angle impact protection with MIPS® in a lightweight design that kids want to wear. Our dial-adjustable fit system gets the fit right every time. There's a low-profile lining for extra comfort plus plenty of vents to keep the air flowing and kids cool. Just buckle 'em up and start pedaling. Protection Lightweight in-mold construction MIPS® Brain Protection System reduces rotational forces caused by angled impacts to the head Fit / Integration Adjustable dial fit system for a customized fit Designed for ultimate integration with Smith performance eyewear for maximum comfort, venting and storage convenience AirEvac™ ventilation system integrates with Smith goggles and eyewear for fog-free lenses Features 21 fixed vents for consistent airflow Performance comfort lining Lightweight, low-bulk single layer webbing Weight: (Size XS, MIPS®): 8 oz / 240g