Flannel Fabric is soft, warm, and really cozy, with a brushed surface that gives it a plush feel. It is one of the flexible fabrics used in clothing, bedding, and home textiles. The reason why people love flannel is because it is extremely comfortable due to its soft, brushed surface. This is very apt for cooler climates, so they are mostly used in shirts, pajamas, bedding, and home textiles.