Designed to accept both wet and dry media, providing the ultimate surface for mixed media. The 100% cotton fiber surfaces are internally sized for wet media with a durable vellum finish for traditional drawing techniques. Excellent for watercolor, gouache, acrylic, graphite, pen and ink, colored pencil, marker, pastel and collage. Mounted to both sides of a high-quality white board excellent for both fine art and commercial illustration. Archival quality, lignin-free and acid free.