This canvas is double sized with a buffered PVA and double primed with thick acrylic titanium gesso, giving it a 12 oz. finished weight. It has a characteristic linen surface texture that is a pleasure to paint. The canvas surface works great with oil or acrylic colors. Linen is the strongest natural fiber in the world, and when properly cared for, it will last for hundreds of years. This canvas is both acid free and pH balanced.