Heavyweight 130 lb., 211gsm, 25% cotton sheet has a toothy, rough vellum surface on one side and a smooth surface on the other. Extremely creamy paper is suitable for pencil, charcoal, ink, acrylics, pastels and oil pastels, watercolor pencils, watercolors (light washes) and tempera. Heavyweight chipboard back allows field use without buckling. Elegant and extremely sturdy texture stamped and foil stamped front cover. Side double pewter metal spiral binding. A percentage of all Nature Sketch sales will be donated to the American Wildlife Fund located in Molalla, Oregon. Please note: PTL-014080 (size 18" x 24") is only available with the 4-color cover at this time.