The filtration structure of the Xiaomi Smart Pet Care Air Purifier consists of a triple-layer composite system. The outermost layer is the primary filter, which traps large-particle pollutants such as pet hair and dander. The middle layer is the Xiaomi high-efficiency filter, which removes 99.99% of fine particle pollutants ranging from 0.1 to 0.3μm. The innermost layer features the Activated carbon formula, specially designed for pets, which effectively absorbs and eliminates odors from pet bodies and waste. This multi-layer filtration system ensures a cleaner and healthier air environment for you and your pets.