These gallery stretched canvases are the heaviest available from Fredrix. Made with premium cotton duck, the Pro Series 20oz Ultimate Canvases weigh 15oz raw and 20oz primed. Use these canvases for heavy paint applications and mixed media work. Each canvas is stretched on kiln-dried stretcher bars and gallery wrapped so that the stapled edges are hidden. The stretchers are reinforced with extra bracing and the canvas is suitable for oil, acrylic and alkyd paints.