Pyramex OTS XL Over-Prescription Safety Glasses are designed to better fit today's prescription eyewear. The OTS XL lenses are 10% larger than the standard OTS. Single lens encapsulates the eye for superb protection. Lightweight nylon temples adjust for length and pitch. Meets ANSI Z87.1 High Impact Requirements and are CE EN166 and CAN/CSA Z94.3-07 certified.