Printed floursacks, (and feedsacks) were a tradition beginning in the US great depression of the 1920's and 1930's. It is estimated that by the early 1940's over 3 million women and children were wearing some version of a printed feedbag garments. Not only were floursack designs simple, so was the concept. They were used as a promotion to sell more flour because the bag, or sack that the flour was packed in could be reused to make clothes