Plastic. Rigid exoskeleton utilizing Switch lock technology for fast and easy lens changing, with a flexible O Matter faceplate that conforms to your face. Large lens design expands peripheral view in every direction, and a streamlined frame design provides full helmet compatibility. Prizm lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility. Optically correct dual-vented Lens with F3 Anti-fog coating & High Definition Optics (HDO) that maintain startling clarity at every angle of vision. Plutonite lens material provides 100% protection against UVA, UVB, UVC and harmful blue light