Elvex's Sonoma bifocal safety readers offer great style sophisticated design. This is Elvex fifth generation of bifocal safety glasses and they make a definite fashion statement. This style is offered in five bifocal powers and in clear as well as brown shaded lenses. The frame is Golden Brown, designed to blend with well with most skin tones. Sonoma, RX-350, complies with ANSI Z87+ high velocity requirements.