Featuring an enhanced 4-step filtration process, these Brita Maxtra filter cartridges have an improved lime scale reduction rate compared to Classic Cartridges. The unique Maxtra filtration technology combines a natural MicroporeFilter and a powerful ProtectFilter reduces taste and aroma impairing substances such as chlorine, chlorine compounds, organic impurities and limescale - for a great natural taste. Suitable for use with the new range of Elemaris, Marella, Fjord Cool, XL systems and Brita Partner kettles. Each pack contains 4 cartridges. Recycle now ! Please return your used filters to the kitchenware department of your local store for recycling.