Ray-Ban RB4181 Polarized Sunglasses feature a simple yet elegant design that flatters faces of all shapes and sizes. These Ray-Ban sunglasses have injected nylon frames with polarized lenses. These polarized crystal lenses increase contrast and visual acuity, and they reduce eyestrain so your eyes feel stronger, longer. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Polarized.