The OX Direct Vent Safety Goggles feature a tough polycarbonate, clear UV-resistant lens. Its soft vinyl flanges around the goggles for ensure comfort and to make it conform to facial contours. Top and side perforations allow optimum air flow while the frame offers direct ventilation. For your comfort, it's made with compact, lightweight construction and is made to be worn over prescription spectacles. These goggles conform to EN166:1B standards.