Model# R-8051 w/Black Frame (NSN: NATO 4240-01-544-4259) Model# R-8051T w/Tan Frame Product Features: Shatterproof Selenite(TM) Polycarbonate Lenses that Meet the MIL-PRF-32432(GL) Ballistic Standards. ANSI Z87.1-2010 High Velocity and Mass Impact Standards, and EN 166 B Resistance to High Speed Particles, and US Federal OSHA 1910.133(b)(1)(i) Standards Spheric(TM) Lens Design for Unmatched Field of Vision 100 Percent UVA/UVB Protection With Distortion Free Clarity T-Shell(TM) lens coating resists scratching in extreme environments Foil(TM) Lens Coating Provides Anti-Fog Protection Sleek Design that is Night Vision Goggle (NVG) Compatible Low Profile that Fits a Wide Array of Head Sizes Smoke Grey Lens Provides Max Glare Reduction with No Color Distortion: Light Transmission 15% Clear Lens for Night, Indoor, Overcast, and Very Low Light Conditions: Light Transmission 90% Rx Insert Kit (R-8051X) Availabile Seaparately Include the following: Smoke Grey Lens Clear Lens Protective Storage Case Protective Sleeve Anti-Fog Wipe Microfiber Cleaning Cloth Instruction Card Eye Size (SP29X Rx Insert): 44 | DBL: 25 | Temple: 100 Head Size: Medium to Large Model# R-8052T - APEL Approved w/Tan Frame (NSN 4240-01-630-6743) Product Features APEL Approved Shatterproof Selenite(TM) Polycarbonate Lenses that Meet the MIL-PRF-32432(GL) Ballistic Standards. ANSI Z87.1-2010 High Velocity and Mass Impact Standards, and EN 166 B Resistance to High Speed Particles, and US Federal OSHA 1910.133(b)(1)(i) Standards 100 Percent UVA/UVB Protection With Distortion Free Clarity T-Shell(TM) lens coating resists scratching in extreme environments Foil(TM) Lens Coating Provides Anti-Fog Protection Sleek Design that is Night Vision Goggle (NVG) Compatible Low Profile that Fits a Wide Array of Head Sizes Smoke Grey Lens Provides Max Glare Reduction with No Color Distortion: Light Transmission 15% Clear Lens for Night, Indoor, Overcast, and Very Low Light Conditions: Light Transmission 90% Rx Insert Kit (R-8051X) Availabile Seaparately Assigned National Stock Number (NSN 4240-01-630-6743) Standard issue to the US Amerd Forces Includes the following Tan 499 Goggle Frame Smoke Grey Lens Clear Lens Rx Adapter Protective Storage Case Protective Sleeve Anti-Fog Wipe Microfiber Cleaning Cloth Instruction Card Eye Size (UPLC Rx Insert): 41 | DBL: 24 Head Size: Medium to XXLarge