Three position rachet lens inclination adjusts to complete the fitting system and provides unsurpassed extended wear comfort * A unique ventilation channel between the frame and lens vents the eye socket area to deliver an outstanding level of moisture and fog control * Soft flexible fingers on the nose piece adjust and conform to almost any nasal profile to reduce slippage * Economical and easy lens replacement system allows for multiple lens tints and extends the life of the eyewear * Meets ANSI Z87+ and CSA Z94.3 standards and military Vo ballistic impact test (7 times higher than ANSI requirements)