Polyester Caution Sign: CARBON DIOXIDE GAS CAN CAUSE INJURY OR DEATH. VENTILATE THE AREA BEFORE ENTERING. A HIGH CARBON DIOXIDE GAS CONCENTRATION CAN OCCUR IN THIS AREA AND CAN CAUSE SUFFOCATION, Improve workplace safety with proper signage. The Caution Sign is a durable, clear and effective tool to properly mark appropriate areas and to help prevent workplace injury, Each