Dissipative Class 100 Clean Room and Higher Chair Covers. Converts non-ESD chairs to ESD Chairs in a Class 100 Clean room or higher. Dissipative (< 1 x 108 ohms) Carbon Grid Micro-Filament Polyester. Converts non-ESD chairs to low charging chairs. Chair Back and Seat Connected to Drag Chain. Allows chair to be grounded when on a conductive surface. Durable Construction. Made in the United States of America.