Flour sack history lesson! In the 1930's, sacks containing flour and grain were made of cloth, primarily cotton. In the midst of the great depression, The Kansas Wheat Company realized that the Cotton Linen Blend Casual Sack Dress Wall Street Western Heroes, Heroines, and History: The History of Frugal Fashion Flair using Feed and Flour Sacks Image of Muslin sack back court dress, c.1780 (Indian cotton muslin embroidered with by Unknown artist, (18th century) flour sack dress AmeriPics The Flour Sack Dress