I don't always prewash flannel....but I do not buy any flannel from jo-anns. I have not had any good experience with it. It either shrinks and lot and most often....it quickly pills. I have had good experience with moda flannels and I do not often prewash that. I do like my quilts a bit puffed. I am somewhat of a fabric snub in that I only bother to make quilts out of good quality fabric even if it is more expensive.....I do try and shop sales and often buy the remainders of bolts that are often on sale