Headrest covers must be changed for which of the following reasons?

Changing headrest covers is essential primarily to ensure sanitation for each client. Sanitation is a critical aspect of maintaining a safe environment in barbering and cosmetology settings. By changing the headrest cover, barbers minimize the risk of cross-contamination and the spread of pathogens between clients. This practice helps protect the health and safety of clients, adhering to industry standards and regulations.

While maintaining aesthetics and facilitating easier cleaning are important considerations, they are secondary to the primary goal of ensuring hygiene and sanitation. Matching a client's hairstyle is not relevant in this context, as headrest covers should always be clean and sanitary regardless of aesthetic preferences. Thus, prioritizing sanitation is fundamental to professional standards in barbering.