The Pentax DX670 Prescription Safety Glasses is a plastic frame with spring hinges. Available in olive and tortoise in 2 different sizes, these Pentax Prescription Safety Glasses focus on safety and feature removable side shields. In addition, these DX670 Prescription Safety Glasses also feature adjustable silicone nose pads for additional comfort. Plus, these Pentax Safety Glasses are prescription available and meet the ANSI Z87.1 industry standards. For more options check out our Pentax Safety Glasses collection.