OAKLEY SI M FRAME ALPHA REPLACEMENT LENS
Oakley?s patented High Definition Optics? (HDO?) eliminates distortion to give you clearer, sharper, and more accurate vision.
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 performance.