Simulated Leather, Imitation Leather, Leather-look, LeatherLike and Leatherflex Bibles may have a leather appearance and may be constructed from a variety of materials. Traditionally these covers are slightly more durable than a paperback but not as durable as bonded leather. However recent developments in imitation leather construction have greatly improved these covers to a standard that rivals bonded leather, and even genuine leather for durability and feel. These man-made materials allow a range of style and color not possible with leather materials. Some of these better quality imitation leathers go by such names as Tru-Tone, TuTone, Duo-Tone, etc.