Stu-Art Economy Ready-Mats are lightweight, acid-free cardstock with a soft, pebbled finish. Windows are and boards are cut to standard sizes are perfect for schools, art clubs, camps, or anytime you need an affordable way to give artwork a finished look. The pre-cut mat is glued to the backing board for ease of use. The inside edge has been die-cut and scored, allowing the border to be folded inward to create a larger opening. It can also be painted or colored with marker and returned to the front for a double mat effect.