Quick-Latch side shields for your Performance Vise and XL Vise. These opaque matte black side shields offer z87+ lateral protection from debris and completely block side light.Side shields are made from shatter resistant polycarbonate and lock into place with the patented Performance Quick-Latch system. Side shields meet the ANSI specified, continuous lateral coverage to meet Z87+ standards. NOTE - THESE FIT PERFORMANCE MODEL GLASSES WITH QUICK-LATCH SIDE SHIELD SYSTEMS ONLY Meets or exceeds Z87+ standards when installed Embossed with Z87+ markings on the inside with R and L markings Sold as a pair Shatter resistant polycarbonate Disclaimer: Side shields must be in place to satisfy Z87+ requirements. Incorrect removal or installation of parts may void Z87 compliance. It is the wearers responsibility to make a visual inspection on glasses to ensure all parts are secure and that the glasses are in good condition before each use.