High-visibility clothing is essential for workers in low-light or high-traffic environments. In the United States, the ANSI/ISEA 107 standard defines three performance classes—Class 1, 2, and 3. These classes determine the minimum amount of fluorescent background material and retroreflective tape required to ensure visibility. Understanding the differences is critical for safety managers and workers alike.

Class 1 provides the lowest level of visibility. It is designed for workers who are not exposed to high-speed traffic or complex backgrounds. Typical users include parking lot attendants, warehouse workers, and those in low-risk environments. The standard requires at least 0.14 square meters of background material and 0.10 square meters of reflective tape. Class 1 garments are often vests or sashes.

Class 2 offers a moderate level of visibility. It is intended for workers near roadways with speeds up to 50 mph or in moderate-risk settings. Examples include construction flaggers, railway workers, and airport ground crews. Class 2 requires at least 0.50 square meters of background material and 0.13 square meters of reflective tape. Garments must have sleeves or full torso coverage.

Class 3 provides the highest visibility. It is mandatory for workers exposed to high-speed traffic (over 50 mph) or hazardous conditions with poor lighting. Examples include highway construction crews, emergency responders, and tow truck operators. Class 3 requires at least 0.80 square meters of background material and 0.20 square meters of reflective tape. Full-body coverage—such as pants and a jacket or a coverall—is required to maximize 360-degree visibility.

In many workplace safety regulations, such as those from OSHA, Class 3 garments are required when workers face fast-moving traffic or limited sight distance. Some situations, like night work or inclement weather, may also upgrade the required class. Employers must assess the risk and provide the appropriate clothing. Choosing the right class not only ensures compliance but also saves lives. Always look for ANSI 107 certification labels when purchasing high-visibility gear. Stay visible, stay safe.