Pleats are folds in fabric that are created by folding the material over itself and securing it in place. They can be found in various types of clothing, such as skirts, dresses, and trousers, adding texture and volume. Pleats can be stitched down or left free, and they come in different styles, including knife pleats, box pleats, and sun pleats. The purpose of pleats is not only decorative but also functional, as they allow for ease of movement and can enhance the fit of a garment. Designers often use pleats to create a flattering silhouette, making them a popular choice in fashion, especially in pieces like skirts and blouses.