The Heli over the glasses OTG goggles by Scott are perfect for those who wear prescription eyewear and require exceptional protection. Scott TruView lenses undergo a permanent anti fog treatment process to prevent condensation and fog buildup. This works in conjunction with the ACS, a sophisticated ventilation system which allows for the intake of air via lens vents and the output with outtake vents on the frame. It creates a constant airflow which maintains and helps to regulate excessive moisture and temperature, further reducing any chance of fogging. A dual layer of hypoallergenic super soft face foam conforms seamlessly to your curves and will seal out the elements delivering a precise and comfortable all day fit.