A crew neck is a type of neckline commonly found in shirts, sweaters, and t-shirts. It features a round, close-fitting design that sits at the base of the neck. This style is popular for its simplicity and versatility, making it suitable for both casual and formal wear. Crew necks are often made from various materials, including cotton and wool, and can be worn by people of all ages. They are frequently seen in fashion items from brands like Nike and H&M, and can be layered under jackets or worn alone for a classic look.