Elvex RX-350BR Sonoma Brown Polycarbonate BiFocal Safety / Fashion Glasses with +3.0 Diopters, Brown Frame RX-350 is available in clear and brown lens versions and five bifocal strengths: 1.0, 1.5, 2.0, 2.5 and 3.0. Frames are offered in skin tone golden brown. Complies with ANSI Z87.1-2003 (Z87+). Great style and comfortable to wear. Exceptional coverage and protection.