The only independently tested and certified shower filter. Improves hair and skin, recommended by stylists! 4-Stage microfiltration that include KDF-55 (made in the US), Calcium-Sulfite, Crystal Quartz Mineral and Limescale inhibitors. Long lasting refills with up to 6 month capacitydepending on water usage. Substances filtered: ShowerPro Diamond Chlorine,Main cause of dry hair and skin. Filters 90% or more. Limescale, Causes limescale in the shower and dry skin. Reduced by 80%. Heavy metals, Filters +90% Minerals, Maintains the minerals in the water. Other impurities, Pipe corrosion, sand... The materials we use for the filter comply with European standards and certification, and reinforce our commitment to sustainability, quality and durability. The filter is made of ABS + PP plastic, free of BPA and phthalates. If you want to clean your filter remember to clean it only with soap and water with a cloth, don't forget to remove the refill to do so!