Description 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. Product Details Protection Lightweight in-mold construction Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older as well as CE EN 1078 and AS/NZS 2063 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