What it is: A filter replacement for your T3 Source Showerhead (sold separately) that helps to convert free chlorine to harmless elements, removing dirt and odors and improving your shower experience.Who it's for: All hair types.What it does: Beauty begins in the shower. Free chlorine can cause hair frizz and reduce shine. This proven filtration system is a mineral mixture that combines calcium sulfide, zinc and copper to reduce free chlorine from your shower water. The process, known as Redox, also helps to remove rotten egg smell, iron oxide (rust water), dirt, sediment and odors from your water for a better, cleaner shower experience. This system has not been evaluated for free chlorine reduction in the presence of chloramines. How to use: To unlock the shower handle, grasp bottom half and turn until the arrow aligns to the unlock icon and pull apart. Remove the used filter and recycle by puncturing screen and emptying the contents into your garden or flushing down the drain. Recycle the plastic container. Remove the seal from each end of new filter. Lightly lubricate the O-rings at each end with petroleum jelly. Push the new filter firmly into handle base until it clicks into place. Push the handle base firmly into top half, aligning the arrow and the unlock icon, and twist the bottom to align the arrow under the lock icon. Flush with hot water for a full five minutes before showering. Replace your filter every 4-5 months (or 6,000 gallons) for optimal results