Part of Oakley’s Ballistic ALPHA System, M Frame Alpha Ballistic Glasses are designed to maximize both comfort and protection. Like M Frame 2.0, the M Frame Alpha features comms friend temple arms and a clip that securely holds the lens in place. Because the M Frame Alpha is designed for the world’s most elite warriors, it’s fully compliant with ANSI Z87.1 and MIL-PRF-32432 requirements for high-mass and high-velocity impacts. The M Frame ALPHA is compatible with the SI Helo Gasket that offers additional protection by creating a seal that blocks high velocity air, dust, sand, and debris that is generated by rotary wing aircraft during infil and exfil operations. Features of Oakley Ballistic M Frame AlphaPermanent Anti-Fog Lens Coating - Anti-Fog Recharge Kit IncludedDistortion-Free High Definition OpticsHydrophilic Unobtainium™ NosepadProtection Against Sand, Wind and DustANSI Z87.1-2003/2010 and MIL-PRF-32432 Rated Oakley SI Ballistic M-Frame ALPHA Operator Goggles Kit w/Square Case + Clear, Grey, PRIZM TR22, & PRIZM TR45 Lens Array OO9296-02