General description The Levoit Cordless Vacuum Cleaner Accessories include a comprehensive 5-stage filtration system that achieves a filtration performance of up to 99.9 percent, making it ideal for pet owners and allergy sufferers. This replacement filter set ensures your vacuum cleaner operates at peak efficiency. Technical specifications Filtration performance: up to 99.9 percent (according to EN 60312-1:2017) Package contents: foam filter x 4, felt filter x 4, post-motor filter x 2 Usage If a reduction in suction power is noticed or the filter is visibly dirty, it must be cleaned immediately to maintain optimal performance.