Chefs wear kitchen shirts primarily for safety, hygiene, and professionalism. These shirts are typically made from durable, heat-resistant materials that protect chefs from burns and spills. The long sleeves and high collars offer additional protection against hot liquids and splattering oil. 
Hygiene is another critical reason. Kitchen shirts are designed to be easy to clean and often come in white, which shows stains clearly, ensuring that chefs maintain a high standard of cleanliness. This visibility helps in identifying when a change of clothing is necessary, reducing the risk of cross-contamination in food preparation areas.
Professionalism and tradition also play significant roles. The classic design of a chef's shirt, often double-breasted, allows for a quick change of appearance by reversing the front flaps, which is useful if one side becomes stained. This maintains a neat and professional look, which is important in the culinary industry where presentation is key.
Additionally, the uniformity of kitchen shirts fosters a sense of team spirit and equality among kitchen staff, reinforcing the hierarchy and discipline necessary in a busy kitchen environment. The attire signifies the chef's role and expertise, commanding respect and trust from both colleagues and patrons.
In summary, kitchen shirts are essential for safety, hygiene, professionalism, and tradition, making them a crucial part of a chef's uniform.