Wiley X uses excellent materials and precision manufacturing to create every lens. All Wiley X lenses block 400 nanometers or 100% of the suns harmful UV rays. Each lens is made from pure shatterproof Selenite Polycarbonate and surpass ANSI Z87.1 safety and ANSI Z80.3 optical standards. They are then formulated and die-cut to eliminate distortion providing the perfect optical clarity. The Nerve is an ultra low profile ballistic goggle which offers superior eye protection in the harshest and most critical situations faced by today's military and law enforcement. NVG compatible with TOP DOWN Ventilation System for a fog free environment. 90 degree wrap frame eliminating tunnel vision. Heat resistant material. Tactical strap has Tri-Glide System to adjust length and quick release key connections. Swivel hinges for wear with or without the helmet. Spheric lens technology for unrivaled field of vision. 8 Base 2.5MM Selenite Polycarbonate Lens. T-Shell and Foil lens coatings provide scratch and anti-fog protec...