JT Spectra Lens:

Spectra lenses pass the American ASTM standard and the European EC Standard. But testing doesn't stop there. They shoot them, stomp them, hit them with 1/4" steel balls at 400fps, rub over them, and let the dog chew them. And that proves one thing, JT lenses meet an even higher standard - the JT standard. With a fog-resistant coated thermal inner lens that can be cleaned with a JT micro fiber cloth, the standard has been lifted even higher to include pure optical style. From the Gradient lenses to there Prizm thermals, you will not find a better lens with a higher standard of safety anywhere.