A sport coat (or sports coat) is an article of clothing worn by men as part of business or formal attire. It is similar to a jacket or suit coat, has long sleeves, and is often made of cotton or wool. Sport coats come in many colors and patterns, but the most common are black, navy blue, brown, grey, and tweed, a special type of grey pattern. If a sport coat is cut a slightly different way, it is called a blazer.
The term sport coat came from the fact that they were originally worn when hunting.