What is flannel fabric

What is flannel fabric?

Flannel is a loose fabric known for its softness and warmth. Originally made from worsted yarn or carded wool, flannel is now made from wool (called wool flannel), cotton (called cotton flannel fabric) and even synthetic fibers. Flannel's characteristic softness comes from the post-weaving bristle process, where bristles are brushed on one or both sides of the fabric (called "pulling") to lift the fine fibers and make them softer to the touch.