The Pyramex Cortez® safety glasses can fit any facial structure with its ribbed, cushioned nosepiece. The frame prevents any kind of slipping which makes it great for extended work hours or hot environments. The single lens provides great coverage from dust and airborne particles that may be harmful to the wearer. These safety glasses are also coated with an extremely scratch-resistant polycarbonate material which shields you from harmful UV rays. The frames of the Cortez® glasses are also fitted with dual injected polycarbonate and rubber temples for a secure fit.