Cross Country Water Filtration System ideal for outdoor activities such as caravanning, camping, 4X4 and home. 1 x 1-3 micron polypropylene micro filter cartridge, 1 x carbon resin with patented KDF micro core filter. This unit is suitable for camping using water from any source provided it is not poisoned or contaminated. This will produce safe, healthy drinking water in large quantities for days or months. No power needed, filters regular tap water, Ideal for camping and holidays.