What type of glass safety rating indicates suitable protection for workers?

The designation that indicates suitable protection for workers is based on the standards set by the American National Standards Institute (ANSI). The Z87.1 standard specifically addresses the criteria for protective eyewear, including specifications for how frames must withstand impact and provide adequate protection from various hazards. When eyewear is labeled as Z87.1 certified, it means it has undergone testing and meets the rigorous requirements set for safety glasses or goggles.

This certification is crucial for ensuring that workers in various environments, particularly those involving potential eye hazards, have reliable protection. The Z87.2, Z89.2, and Z88.2 standards pertain to other areas, such as hearing protection and respiratory devices, which do not directly relate to eyewear safety. Therefore, the Z87.1 certification is the correct answer, as it directly correlates to the safety of eyeglasses and ensures that they meet the necessary protective criteria for workers.