The WileyX® Changeable PT-1 Military Glasses Features:
•Shatterproof Selenite™Polycarbonate Lenses that Meet the Mil-PRF-32432 (GL) Ballistic Standards.  ANSI Z87.1-2010 high Velocity and maass impact standards, and EN 166 FT at high speed at Temperature extremes standards, and US federal OSHA 1910.133 (b) (1) (i) standards.
•100 Percent UVA/UVB protecttion with Distortion Free Clarity
•T-Shell ™lens coating resists scratching in extreme enviroments
•Wrapback™Design for Maximum Peripheral Vision
•Adjustable take Fligh Nose Piece accommodates any Face/Nose Bridge
•Smoke Grey Lens provides Max Glare Reduction with no color distortion: Light transmission 15%
•Compatible with Wiley-X's Prescription Lens Carrier (PTX) sold separately
•Case Included.  Limited Lifetime Warranty