Why did guards on Alcatraz have crew cuts?

Guards on Alcatraz often had crew cuts as a practical measure for maintaining a professional appearance and promoting uniformity among the staff. The short hairstyle was also associated with military discipline, reflecting the strict order and authority required in a high-security prison environment. Additionally, crew cuts made it easier for guards to manage hygiene and avoid lice or other infestations, which were concerns in such a close-quarters setting.