Protect your loved ones and appliances with this dynamic duo. Breathe easy with cleaner, healthier air. Chlorine and volatile organic chemicals (VOCs) can evaporate in shower steam, contaminating the air you breathe. Instantly improve your indoor air quality by filtering the water throughout your home with the (THD part). Aquasana SimplySoft is better than just a softener. Unlike salt-based softeners, SimplySoft won't demineralize your water by chemically removing minerals nor will it put excess salt waste or chemicals into our environment. Does not require electricity, drainage for wastewater, or complicated salt replacement. Color: Blue.