The optical 20-mil poly carbonate insert is imbeded with a patented anti-fog coating technology that prevents shield fogging and absorbs over 98% of harmful UV rays. The insert is easy to install thanks to the "peel and stick" system with no tools and without damaging your shield. Installation instructions are provided in the package.
There are two sizes of inserts: 276 and 281. The 276 insert also fits the 285 shield while the 281 insert also fits the 280 shield.