Which of the following is NOT a requirement for security officers regarding their materials?

Security officers are typically required to have specific materials that help them perform their duties effectively. Badges serve to identify security personnel to the public and designate their authority, while uniforms create a visible presence and help instill confidence in their role. Communication devices are essential for coordinating activities, reporting incidents, and maintaining safety, as they enable security officers to remain connected with their team and receive assistance when necessary.

Sunglasses, while they can be a part of an officer's attire for reasons such as protection from the sun or aiding in visibility during certain circumstances, are not a standard requirement for security officers. Their primary function is more about personal comfort and protection rather than serving a specific operational need. Therefore, the absence of sunglasses does not affect a security officer's ability to perform their job duties, making them less critical compared to the other materials listed.