Fredrix Pro Series 20 oz. Ultimate Canvas is the heaviest stretched canvas available from Fredrix. Weighing 15oz raw and 20oz primed, this canvas has an excellent tooth suitable for oil, acrylic and alkyd paint applications. The professional-quality surface and extra bracing make this canvas ideal for mixed media and heavy paint application. Each premium cotton duck canvas is stretched on kiln-dried stretcher bars and staples are hidden with a crisp gallery wrap.