Anti-Static Mats An anti-static floor or ground mat is an anti-static device that safeguards an individual or piece of equipment like a PC from an electrostatic discharge (ESD). Computer components that are sensitive to static electricity or ESD are motherboard, CPUs, expansion cards and memory devices. How Anti-static Mats work. A typical anti-static mat is comprised of three layers. The top layer is a static dissipative vinyl that discharges conductors; the middle layer is a conductive metal sheet that provides the discharge path to ground, and the bottom one is non-skid foam.