Spiral bound so that it can be opened flat or folded back for convenience. The medium texture and white/gray colour balance of Quill cartridge paper makes it suitable for many different creative styles, with a wide range of drawing media Feature an elastic strap closure to prevent covers from opening Removable pocket divider The paper is acid free so you don't need to worry about discolouration Durable polypropylene front cover Heavy weight backing board for added stability and strength