The filter is made using advanced nanotechnology. It captures liquids like a magnet and does not contain any toxic chemicals. Replacing the filter cartridge every 2-3 months saves cooling energy. The replacement cartridge quickly absorbs water and heat. Mineral fibers prevent the formation of mold and bacteria. Simple installation in seconds. 2 minutes later, the evaporative cartridge is fully hydrated and gradually cools the ambient air. The large evaporative surface is very efficient. The high-quality rock filter eliminates unpleasant odors and keeps the air fresh. The oversized and efficient evaporative surface produces a soft and healthy mist. Enjoy clean, fresh air and save money by replacing the filter instead of buying a new air cooler. The wind removes the negative ions produced when you cool down. When the skin is closed, the body temperature can reach around 5 to 8.