These hard-cover sketch books feature high performance paper that is milled from pulp with an alpha cellulose content that exceeds 87%. The heavy-weight 100 lb. paper has a toothy, ivory vellum surface with superb erasure characteristics and is suitable for all dry media. It will accept light washes as well. The covers are made with extra heavy-weight binders' board that is super tough and resistant to warpage. This wire-bound book contains 50 ivory sheets and was bound in the USA.