This page lists all of our safety glasses with Brown and Bronze lenses, sometimes labeled Mocha, Espresso, or Coffee. Like yellow, orange, and copper, they block much of the blue light that causes haze or reduces sharpness (though less effectively than copper), thereby enhancing contrast and depth perception. They cause some color distortion, but much less than that from yellow or orange lenses. For Outdoor use. VLT = 12-26%