RH Activ 220 ESD has a large backrest and medium seat. Base in black lacquered aluminium and free wheeling ESD castors in metal. RH Activ 220 ESD is certified and approved for work environments requiring antistatic protection for areas with sensitive electronic equipment found in clean rooms and laboratories. RH Activ ESD effectively diverts static electricity through the back, seat, gas lift down to the floor. The fabric on the chair is designed to conduct static electricity.