So you learned about how commonly contaminated shower water is and treated yourself to a Jolie Filtered Showerhead. Problem solved. You still want to maintain the cleanest water possible, so you'll need a Replacement Filter as well. Jolie's best-in-class filtration system relies on two effective filter mediums: KDF-55 and Calcium Sulfite. This is the good stuff — built to remove more chlorine & heavy metals than any other filter on the market. By replacing the filter every 90 days, you ensure your skin & hair look and feel their best. Cause cleaner shower water equals a healthier, happier you.