Winsor and Newton Classic canvases are crafted from faultless 100% cotton cloth primed with highly pigmented titanium dioxide gesso producing a 12.3oz gessoed canvas ideal for use with acrylic or oil paints. Hand stretched for expert tension and clean, tailored corners and lighter weight, warp resistant, kiln dried stretcher bars produce superior tension. Archival and acid free. Traditional profile: approximate " depth, Medium-Weight Canvas, Created for students and professionals requiring better quality canvas, Medium-weight canvas for light to medium paint application, Back-stapled, regular duty construction.