Descos Statfree Z2 mat is a .125 inch thick, 3-layer, dissipative heat fused vinyl composite material. It is designed to provide a path-to-ground and eliminate static charge generation when used as a work surface table mat, shelf liner, and cart shelf liner. Meets ANSI/ESD S20.20 work surface required limit and recommendation of ANSI/ESD S4.1 for contact with ESD susceptible items. Electricals will not drift for the life of the mat. The dedicated conductive layer reduces the resistance to ground (Rtg) from the top of the surface to the ground able point ground and allows the mats to be used with monitors. Cushioned bottom layer provides additional energy absorption for components susceptible to physical shock. Dissipative Abrasion Resistant Top Layer (1 x 10 to the power of 6 <1 x 10 to the power of 9 ohms Rtt). Conductive Mesh Middle Layer (x 10 to the power of 4 Rtt). Dissipative Cushioned Bottom Layer (1 x 10 to the power of 6 <1 x 10 to the power of 9 ohms Rtt). Lead-free RoHS compliant. Covered by manufacturers Limited Lifetime Warranty. Made in the United States of America. Item Dimensions: 48-inches long by 24-inches wide, .125-inches thick.