When people search for warm, soft, and comfortable textiles, flannel fabric and fleece are two of the most frequently compared materials. They are both widely used in clothing, bedding, baby products, and home textiles, yet they differ significantly in fiber composition, manufacturing process, performance, sustainability, and target applications. Understanding the difference between flannel and fleece is not only important for consumers, but also essential for brands, designers, importers, and fabric buyers who want to select the right material for specific markets.