Made in the United States of America"The most important functional consideration for worksurfaces is the RTG resistance from the top of the surface to the groundable point." ANSI/ESD S20.20 Table 1 recommends a requirement of less than 1 X 10^9 ohms. "If Charged Device Model damage is a concern then setting a lower resistance limit should be considered. Typically, 1 x1 0^6 ohms. Durability factors that should be considered are hardness, abrasion resistance, tear resistance, etc. Worksurfaces may require special heat-resistant materials. Light reflection may be an important ergonomic consideration.