Replacement Filter Humidifier for Arctic Air Personal Space Cooler The filter is made with advanced nano technology. Captures liquid like a magnet and is free of toxic chemicals. It is easy to replace the filter every 2-3 months to save cooling power. The replacement cartridge is built with rapid water absorption and heat absorption functions. 100 percent mineral fibers prevent the growth of mold and bacteria. Easy installation, do it yourself in seconds. After 2 minutes, the evaporative cartridges will be fully hydrated and gradually cool the air around you. It is very efficient with a huge evaporative surface. The high-quality anti-stone filter eliminates foul odors and keeps the air cooler clean. Efficient with a huge evaporative surface, delivers soft and healthy mist, enjoy clean and fresh air by replacing the filter rather than buying a new air cooler, save money. The wind takes away the negative ion from cooling for you. When skin closure, the somatosensory temperature can be around 5-8. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.