Our shower head comes with double-layered shower filter which is composed with PP cotton and Calcium Sulfite balls inside. PP cotton on the outside removes impurities such as sand/rust/sediments/heavy metals, while Calcium Sulfite balls reduce residual chlorine from the water. Unique design utilize internal structure, smaller and denser water outlet holes provide you with strong pressured water jet, at the same time reduce water consumption without sacrifice effciency. The purified shower water can make your skin smoother and hair softer, prevent itchy skin and dry hair. NOTE: Filters might affect water pressure and temperature depends on shower system.