Flannel is a soft, woven fabric that is often made from cotton, wool, or synthetic fibers. It is known for its warmth and comfort, making it a popular choice for clothing like shirts, pajamas, and blankets. Flannel can be brushed on one or both sides to create a fuzzy texture, enhancing its coziness. Originally, flannel was used in Wales for making shirts and undergarments. Today, it is widely used in various products, including bed linens and sleepwear. The fabric is available in many colors and patterns, with plaid being a particularly popular design.