A crew neck is a type of neckline commonly found on shirts and sweaters. 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 casual and semi-formal wear. Crew necks are often made from various materials, including cotton, wool, and synthetic fabrics. They can be worn alone or layered under jackets and cardigans. This neckline is favored by many, including athletes and fashion enthusiasts, for its comfort and classic appearance.