Interchangeable lenses
  
 The lenses are compatible with M-Frame Alpha glasses
  
 Low profile frame allows for comfortable wearing with a helmet
  
 Plutonite® lenses provide the best UV protection by filtering 100% of UVA, UVB, UVC radiation and harmful blue light up to 400nm
  
 Photochromic lenses, which can be purchased separately, 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
  
 Compatible with PASGT, CVC, ACH, MICH, Crye, Ops-Core and Team Wendy helmets