The shower and bath filter utilizes KDF technology as the filtration media. KDF is a compound of granulated copper and zinc that removes chlorine, iron oxides, hydrogen sulfide and traces of heavy metals. It is a bacteriostatic media that inhibits the growth of E. coli, mold and other bacteria. KDF in the presence of hot water literally becomes catalyzed to perform more efficiently; And, therefore, is the most efficient, state-of-the-art technology for shower and bath filtration. Bring back your hair's natural shine with the Royale 5 Hand-Held Filter. See and feel healthier looking skin in just days. The Royale 5 Hand-Held filter offers both stationary and hand-held positions perfect for family and pets. It adjusts to various heights and angles making it an ideal shower filter for all people.