4 ft wide royal blue 20 ounce super heavy FIRE-RETARDANT CPAI and Water-repellent Excello canvas. Requires a heavy machine to sew and I only have this left in blue 4ft wide. I am clearing this out at a low price as it is the last 20 ounce I have in the shop and it needs to go. Needs rinsing before or after sewing with water to make sure the overdye is off or it may get blue on white socks if you use it for floors.