In the ALPHA system, the glasses are cross-compatible with the frame of dust glasses
  
Plutonite® glasses provide the best UV protection by filtering 100% of UVA, UVB,
  
UVC radiation and harmful blue light up to 400nm
  
Gray lenses (16% light transmission, neutral contrast), TR22 lenses (19% transmission, higher contrast)
  
HDO® (High Definition Optics®) ensures the best sharpness at every angle
  
Meets MIL PRF-31013 and ANSI Z87.1-2003/2010