The Capstone Shield fits over prescription glasses with fully adjustable elastic band to protect face from increased impact and dust protection. 4 ventilation holes provide appropriate airflow. Ratchet shield allows user to open or close in 3 positions for adjustment. Polycarbonate shield conforms to the face offering increased impact and dust protection. Indirect-vent frame provides protection against splash and dust. Soft vinyl goggle body conforms to facial contours for a very comfortable fit. Scratch resistant polycarbonate lens provides 99% UVA/B/C protection.