The Jura Claris Blue Filter Cartridge reliably filters the water to leave the optimum ingredient for pure water, perfect coffee and pure enjoyment. Coffee contains 98% water, so the better the quality of the water, the purer and less adulterated the coffee aroma. Positioned directly in the water tank, the CLARIS filter freshly filters the water every time coffee is prepared. It completely absorbs harmful substances while retaining important fluorides, which help the flavours to really develop. With the optimum water quality, every cup of coffee becomes a full-bodied taste experience and CLARIS eliminates the need to descale the machine.