Office chair mat protects desk and computer workstation carpet and rug surfaces from caster or wheel based chair damage Includes rectangular mat made of clear polycarbonate; free of phthalates, tin, lead, and cadmium; no emissions or odor Designed for low to medium pile carpets and rugs from 0.25 to 0.75 inch thick High impact resistant, easy glide rolling surface; lightly textured allows for controlled chair movement Instantly flattens and stays flat, unlike vinyl and some other plastics; will not curl, cup, or flex while in use Gripper back under side ensures maximum stability on carpeted flooring Durable and hard wearing for long-life protection; easy to clean, no chemicals needed for best results Product dimensions: 30 x 47 inches