The Pentax Eagle Prescription Safety Glasses is a non-conductive frame designed to wrap around the face. Available in 3 different sizes, these Safety Glasses come with a brow guard and are prescription available. The Eagle Prescription Safety Glasses also feature adjustable temples that guarantee a perfect fit. In addition, the Eagle Pentax Safety Glasses meet the ANSI Z87.1 industry standards and have passed the requirements of a modified ASTM D149-09 test for dielectric strength, and did not conduct electricity up to 1,000 volts for 60 seconds.