ESD 2 Layer Smooth Rubber Work Surface Mat With Wrist Strap 24" X 36" - Royal Blue Excellent resistance to hot solders, soldering irons and most solvents The ESD rubber mats are made of a durable 2-ply rubber A conductive layer backs the static dissipative top layer that creates outstanding electrical performance characteristics. Offers excellent resistance to hot solders, soldering irons and most solvents.