A waterproof working jacket is a piece of personal protective equipment that is designed to be highly visible and reflective. When there is low light or at night, the safety jacket should be highly visible during the day. Safety jackets must ensure the worker stands out and is distinguished from the background, which includes heavy equipment, machinery, materials, and motor vehicles. Wearing a high-visibility jacket helps them to remain aware of nearby personnel who may be in danger of being hit by vehicles or equipment. Therefore, they are able to avoid running over other co-workers, preventing accidents and saving lives.