The Pentax F9900 Perforated Prescription Safety Glasses is a plastic frame with Perforated Full-Cup side shields. Made from propionate, these permanent Perforated side shields provide ventilation, which helps to reduce fogging. Available in a smoke frame in 2 different sizes, these Pentax Safety Glasses are prescription available. Plus, the Pentax F9900 Perforated Prescription Safety Glasses meet the ANSI Z87.1 industry standards. For more options check out our Pentax Safety Glasses collection.