J. Ennis carries three untreated canvases including #12 Duck, #4 Duck and 12-ounce single fill. The 100-percent dye-free cotton canvases are suitable for a variety of applications from boat covers and tarps to totes and tents. Shrinkage is approximately 7 to 9 percent. Canvas is available in 10 colors. Rolls are up to 50 yards long and 60 inches wide.