The Oakley Industrial M-Frame® Safety Glasses is a rugged frame with its three shields of Plutonite. The first lens is the grey lens, and it controls both the reflection and light transmission. The second and third lenses are the clear and VR28, which provide optimal vision for night and low light settings. Innovative Polaric Ellipsoid Technology geometry preserves sharp clarity to keep you focused and concentrated. Your field of view will also not be compromised thanks to the low-profile nosepiece. The lenses sport an anti-fog coating on the back surface which couples nicely with Plutonite® lens material that filter both harmful blue light up to 400nm wavelength as well as UVA and UVB. The grey is best in bright light environments with the 15%-17% visible light transmittance. They also meet the MCEPS neutrality and chromatic requirements. The clear lenses have a light transmittance of 89%-93% and is excellent in low light and no light conditions. The third and final lens, Persimmon lenses, have 69% light transmission and are suitable in low and no light conditions. The frame comes is compatible with over-ear hearing protection and communication systems thanks to its thin stem technology. The frame is impact and chemical resistant because of it's O-Matter® frame and it features a quick tool-free lens change. The design keeps the frame weight ultra light at 1.05 ounces in total, and the M-Frame is compatible with helmet mounted night vision devices as well as MICH, ACH, CVD, PASGT, and Crye™ Helmets. The frame meets the high mass and high-velocity impact requirements laid out by ANSI Z87.1-2003/2010 and the ballistic fragmentation impact standards per MIL PRF-31013, Clause 3.5.1.1. As an alternative to the Oakley Industrial M-Frame® Safety Glasses, check out our collection of Oakley Prescription Safety Glasses.