Dogs love flannel too! Our soft flannel, backed with warm fleece, is a great way to keep pets comfortable and warm in style. Flannelize your dog and your family. Tightly woven flannel, minimal shrinkage, wash cool & dry low. Made with our 11.8 oz heavyweight Patchwork fabric, brushed beyond reason for ultimate softness. organic cotton exterior with a premium poly fleece interior lining. Finest European fabric, hand cut and sewn in the USA.