High-impact, 2.2mm polycarbonate lenses ANSI Z87.1-2015 compliant Rotating lens gate provides rapid lens exchange and secure lens retention under impact 100% UVA/UVB protection These high-impact, 2.2mm polycarbonate Hi-Def Bronze accessory lenses fit the ESS Rollbar sunglass. The Rollbar sunglass frame features a rotating lens gate that provides extremely rapid lens exchange and secure lens retention under impact.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }