Strathmore 400 Series Bristol Drawing Board measuring 22 x 30 inches is made of 100% cotton fiber that withstands repeated erasures and reworking without feathering. It is ideal for pencil, charcoal, pastel and oil pastel as well as for airbrush and light washes. Acid-free, 2 ply board features vellum surface and comes with a toothy finish. Sold as 25 per pack.