Karst Stone Paper Sketchbooks are filled with 96 pages of premium, recycled stone paper. This unique material is naturally waterproof, tear-resistant, and velvety to the touch. Unlike traditional pulp paper, Karst stone paper has a slick, frictionless surface that’s a joy to sketch on. With a weight equivalent to 240 gsm, these pages resist bleed-through while supporting even the boldest marks. The paper is compatible with any medium, wet or dry. Each notebook is finished with a smooth hardcover to keep pages intact. Experience durability, innovation, and smooth performance all in one sketchbook!