A doctor's coat, often referred to as a lab coat, is a white, knee-length garment worn by medical professionals. It is typically made of cotton or a cotton-blend fabric, which is easy to clean and durable. The coat usually features long sleeves, a front button closure, and pockets for carrying essential tools like pens, notepads, and small medical instruments. The primary purpose of the doctor's coat is to maintain hygiene and professionalism in a clinical setting. It helps protect the wearer's clothing from spills and stains while also providing a recognizable uniform that signifies the role of the doctor in patient care.