These safety glasses are made in the USA in a lightweight, impact-resistant construction and offer visual protection in industrial work spaces. HDO® Optics with Polaric Ellipsoid Technology Permanent anti-fog coating on the back surface Full compatibility with MICH, ACH, CVD, PASGT, and Crye™ Helmets Meets or exceeds ballistic fragmentation impact standards per MIL PRF-31013, Clause 3.5.1.1 Meets or exceeds high mass and high velocity impact requirements per ANSI Z87.1-2003/2010 Grey lens features 15% visible light transmittance suitable for bright light, meets MCEPS neutrality and chromaticity requirement Impact and chemical resistant O-Matter® frame equipped with Unobtainium® increases grip and Thin Stem Technology for over-ear protection compatibility 100% UV protection Plastic Made in the USA