These Pyramex(R) OTS(R) safety glasses with anti-fog lenses are designed to better fit today's prescription eyewear. The lightweight nylon temples adjust for length and pitch. A single lens encapsulates the eye to help protect it from harm as well as excessive glare. Lenses are coated to help resist scratches. Fits over frames up to 5?" (137mm) W x 1 3/4 " (44mm) H.