Reflective Safety Vest
These come in a variety of colors usually, and can be non reflective or reflective. You can also get a supervisor vest to stand out from the other workers. Pockets are also another option in case there are things you need a place to store papers, etc.
For colder environments, try the reflective safety jacket, it provides more warmth than the reflective safety vest. These reflective safety jackets are reflective at night, and fluorescent during the day, so that you are always seen. Most reflective safety vests are very durable, so you don’t have to worry about them tearing during the job.