They are considered personal protective equipment (PPE) and are typically required for workers who operate in conditions where being easily seen is crucial for safety. High-visibility shirts must meet specific standards for the amount and type of reflective material used, as defined by the American National Standards Institute (ANSI) and the ANSI/ISEA 107-2020 standard.
These standards specify the minimum amounts of reflective material used on the apparel to be considered hi-vis.
The shirts are available in fluorescent colors such as yellow-green, red, and orange-red, which are easily discernible from any background and highly reflective.

What are the benefits of wearing high-vis shirts? / Why should you wear a hi vis shirts?
Wearing high-visibility shirts, also known as hi-vis shirts, offers several benefits, including:
Enhanced Visibility: Hi-vis shirts with highly reflective properties help reduce the risk of worker injury or fatality by allowing motorists and others to easily see the wearer, especially in low-light or high-traffic environments.
Reduced Chance of Accidents: High-visibility clothing significantly reduces the likelihood of accidents by making the wearer more visible, especially in construction and road work settings.
Better for Emergency Situations: In emergency situations, hi-vis clothing makes it easier to spot employees, even in dark or hazardous conditions, improving safety and aiding first responders.
Safer During Hazardous Weather: Hi-vis clothing is particularly important during hazardous weather conditions, such as heavy rain or fog, as it helps workers remain visible and identifiable.
Professional Identity and Morale: High-visibility clothing promotes a professional identity, enhances worker pride, and can improve company morale by signaling a commitment to safety.
In summary, wearing high-visibility shirts is crucial for worker safety, as it enhances visibility, reduces accidents, and improves overall safety in various work environments.

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