Cass Art Artists' Natural Linen Canvas is made from high-quality European spruce wood and 100% pure flax linen. Made from the highest-quality spruce wood and 100% pure flax linen, this exhibition grade, European made, medium grain, clear primed canvas has been produced for use with all forms of oil and acrylic colour, as well as many other mixed media applications. These canvases are primed, FSC approved and acid-free. The canvas range in size and are 2cm / 0.79 inches deep. Each canvas has a heavyweight at 320gsm / 11.3oz.