Fit: Youth medium fit, Dual-slide strap for easy size adjustment. Floating foam membrane eliminates eyeglass temple pressure.Integration: Designed for ultimate integration with Smith helmets for maximum comfort, venting and fog-free performance. Two-layer DriWix face foam wicks moisture for a fog-free fit. Silicone-backed strap stays put.Vision: Cylindrical Carbonic-x lens for clarity and impact resistance with built-in Airflow technology for active ventilation. Fog-X anti-fog inner lens for fog-free performance, Designed to fit over your glasses (OTG).