ELECTRIC KNOXVILLE S MATTE TORT BRO POLARIZEDElectric® makes an impact with the bold style of the Knoxville XL S.XL S model features scaled-up sizing for added coverage.Six-base mold injected Grilamid frame is durable with just the right amount of flexibility.Three-barrel stainless steel optical hinges.Six-base OHM polycarbonate lens with protective coating.Polarized lenses eliminate glare for added clarity.100% UV protection with 98% Blue Light protection.Storage bag included.Imported. to view our entire selection of Electric products