Genuine Morento air purifier replacement filters guarantee certified fit and optimal performance. Different from original filter, the enhanced version filter is covered with a layer of electrostatic cotton that can intercept more large particles and pollutants in advance and absorb more odors to achieve higher filtration efficiency. The electrostatic cotton layer can be torn off when it's worn out, and the remaining filter layers continue to function for an extend lifespan. Off-brand filters frequently fail Hepa testing standards, fit incorrectly, reduce efficacy, and may cause damage to your Morento air purifier. Only when used in conjunction with a genuine filter will your purifier be strong and efficient.