We make small quilts using our leftover cotton quilting fabrics and 100% cotton batting or Warm and Natural. No flannel because it does not seem to wear well with all the pulling and tugging and rearranging that the animals are so good at. Cotton thread for sewing and quilting. If threads get loose, the cotton is less likely to harm the animals. Most, but not all, shelters are grateful for any supplies you can provide. The animals thank you!