A black work jacket is a versatile and durable piece of clothing suitable for various professional settings. Typically made from sturdy materials like canvas, cotton, or polyester blends, these jackets offer protection and comfort while maintaining a sleek, professional appearance. 

These colors are chosen for their ability to stand out in various lighting conditions, making the wearer more noticeable during daylight hours. To enhance visibility further, hi-vis jackets often include reflective strips that catch and reflect light from sources such as vehicle headlights, ensuring the wearer is visible even at night or in low-light situations.

The design of hi-vis jackets is governed by safety standards that specify the required levels of visibility. For example, the American National Standards Institute (ANSI) sets guidelines in the United States for the placement and width of reflective strips and the minimum amount of high-visibility material used.