Beauty begins in the shower. Free chlorine can cause hair frizz and reduce shine. T3 Source Handheld Showerhead Replacement Filter converts free chlorine to harmless elements, removing dirt and odors, and improving your shower experience. The proven filtration system is a mineral mixture combining calcium sulfide, zinc, and copper to reduce free-chlorine from your shower water. The process, known as Redox, helps to remove rotten egg smell, iron oxide (rust water), dirt, sediment, and odors from your water for a better and cleaner shower experience. This system has not been evaluated for free chlorine reduction in the presence of chloramines. Use with T3 Source Hand-Held Model No. 73311 (sold separately). This system has not been evaluated for free available chlorine reduction performance in the presence of chloramines. Free available chlorine reduction performance may be impacted by the presence of chloramines in the water supply. Please contact your local water utility to determine if chloramines are used in treating your water.