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 180 lb. paper has a rough ivory surface with enhanced wet and tear strength making it is suitable for multi-media renderings. The covers are made with extra heavy-weight binders' board that is super tough and resistant to warpage. This hardbound book contains 26 sheets and was bound in the USA.