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JT lenses pass the American ASTM standard and the European EC Standard, but testing doesn't stop there. JT shoots them, stomps them, hits them with 1/4 inch steel balls at 400 fps, runs over them, and lets 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.