Fredrix Gallerywrap stretched canvas is made of medium weight and medium textured 100% cotton duck that is stapled on the back in order to provide clean, staple-free edges that allow for painting on all four sides and the option of hanging without a frame. Each canvas is double primed with acid-free, acrylic titanium gesso creating an ideal surface for both, acrylic and oil painting. The use of heavy duty 1½" x 1½" stretcher strips provides a thicker side painting surface along with securing the pegable and adjustable support.