In the ALPHA system, the lenses are cross-compatible with the frame of dust glasses/goggles
  
Plutonite® lenses provide the best UV protection by filtering 100% of UVA, UVB, UVC radiation and harmful blue light up to 400nm
  
Photochromic glasses that darken as the outside light increases
  
HDO® (High Definition Optics®) ensures the best sharpness at every angle
  
Meets MIL PRF-31013 and ANSI Z87.1-2003/2010