The Alpha lens was designed to maximize field of view and protection, without sacrifice to style and aesthetic. All replacement lenses meet MIL PRF 32432 Ballistic Impact Standard, and Optical Clarity of ANSI Z87.1.Fits SI M Frame™ Alpha and SI Halo™ High Definition Optics® (HDO®) for unbeatable clarity and performanceLens contours that extend peripheral vision and improve side protectionPlutonite® lens material filters out 100% of all UVA/UVB/UVC & harmful blue light up to 400nmUnsurpassed impact protectionOptions include Iridium® lens coatings and Prizm™ technologyCompatible with SI Helo Kit.
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