A mock neck is a type of collar that is similar to a turtleneck but shorter. It typically extends just above the collarbone and does not fold over like a traditional turtleneck. This style is often found in various garments, including sweaters, shirts, and dresses, providing a stylish yet comfortable option for cooler weather. Mock necks are popular in both casual and formal wear, making them versatile for different occasions. They can be worn alone or layered under jackets and blazers, offering a chic look without the bulk of a full turtleneck. This design is favored for its ability to keep the neck warm while maintaining a sleek silhouette.