1st Clear Chair Mat Certified for Low Product Emissions. The core line of clear chair mats has achieved GREENGUARD Certification for low chemical emissions, making chairmats a healthier option for use in the home and workplace. Improving the quality of indoor air is vital for human health. The most effective way to reduce indoor air pollution is to reduce or eliminate the sources of harmful chemical emissions. The certified GREENGUARD standards for low chemical emissions into the indoor air gives assurance that products designed for use in office environments and other indoor spaces meet strict chemical emissions limits, which contribute to the creation of healthier interiors.