ESD/anti-static mats are used to ground a workstation or facility against damaging electrostatic buildup. Mats are essential to creating a clean room work environment, temporarily or permanently. Common ESD mats are made from rubber with a static dissipative top layer and a conductive rubber bottom layer. Anti-fatigue mats incorporate materials with shock-absorbing properties to provide comfort and reduce worker fatigue in static-sensitive operations. Anti-static mats are available in tabletop and floor models, with some integrated with grounding cords.