Replacement Nano Filters for G2T-ICE Mini Air Cooler. It's suggested to replace new filter for every 3 months. When NANO filter is dirty, just rinse it under running tap water. However, after heavy usage of MOAI, if it cant be cleaned and does not work functionally, please replace to the new one instead. G2T-ICE is a natural personal cooling device. Needless of the coolant and compressor, the air cooler uses only water and proprietary heat absorption cooling filter to achieve most efficient cooling effect. The cooling filter is made from particular fibers to absorb largest amount of water within short period of time and enables G2T-ICE intensive evaporation with smallest filter size. The frictions of gaseous water molecules in the cooling filter creates anions (OH ion) in the air; this is the most natural way to generate anion.