The phrase "knitwear suit with 4 buttons"- is probably a term used to describe a clothing item. This expression is used to describe the features and style of a suit or jacket. Here are the basic terms that explain this expression: Knitwear: Knitwear- means knitted or braided fabric. Knitwear fabrics, which generally have a soft and elastic texture, provide comfort and flexibility in clothing. Suit: A suit is a clothing unit that usually combines a jacket and trousers in the same fabric and color. Suits - especially preferred for formal or business wear. 4-Button: The term "4-button"- refers to the number of buttons on the front of the jacket. This may vary depending on the style and design of the jacket. For example - a 4-button jacket is usually held closed with buttons - but only the top two or top three buttons can be used.