JT Spectra Lenses fit a wide variety of JT paintball masks including the extremely popular JT Proflex, Flex 8, JT Proshield, and JT Premise. These thermal replacement lenses are dual pane which keeps them from fogging up and extends the life of your spectra lens. The spectra lenses are easy to swap out using tabs along the perimeter of the lens to pull off the Proflex/Proshield frame. Then, simply push the tabs of the lens into the rubber frame to install your new lens of the JT Spectra lens! Lens offers 260 degrees of field vision and ASTM UVA and UVB protection. Dont forget paintballs.