Moda!! Love their flannel. So thick and soft and has never pilled on me. I have never gone wrong with Moda flannel. There are other good flannels I have used as well. Windham, Timeless Treasures and Northcott also make very nice thick flannels. I know there are a few others but I'd have to go check the selveges on my stash. But #1 for me is Moda.