Yes I should have known better, but I bought some of the 2.97 white fabric yesterday, as all the quilt shops were closed. I cut strips this morning and noticed it was very thin, but began combining two sets of strips, thank goodness I have no ability to postpone gratification, and ironed one set and notice the white was crooked, okay, maybe my cutting wasn't good, so I took the next strip set and cut into sections first and then ironed. everyone of the white sections shrunk and bowed, right before my eyes. Must have had a lot of polyester in it. thank goodness I have now found some of my white fabric from the fabric store, and can recut the strips.