Computex anti-static chairmat dissipates static electricity to protect electrical equipment from the damaging effects of static. Unique, phthalate-free PVC formulation provides the clearest, most durable, antistatic mat. Computex Advantagemat Antistatic Chairmat is 100 percent free from cadmium and lead. It is also 100 percent recyclable and manufactured using up to 30 percent renewable energy. Gripper back is ideal for use on standard-pile carpets up to 3/8" thick.