1.[PERFECT COMPATIBILITY]: Our Vital 100 replacement filter is fully ONLY compatible with LEVOIT Air Purifier Vital & Vital -RF. Package included 2 Pack Vital 100 replacement filters and 4 PACK Pre-filters, meet your needs to replace and use.(Not for LEVOIT Vital S & S Air Purifier.) 2.[3-STAGE TRUE HEPA FILTER SYSTEM]: 3-in-1 True HEPA system of vital 100 air filter includes Washable and Removable Pre-Filter, High-Efficiency Activated Carbon Filter, H13 Grade True HEPA Filter.Work for 99.97% of airborne particles down to 0.3 microns in size,attach, protect your home from pet hairs,pet dander and odors. 3.[PREMIUM QUALITY]: Vital 100 filter for Levoit air purifier is made of premium non-woven fabric and activated carbon, H13 Grade True HEPA Filter attach pollen,pet dander, High-Efficiency Activated Carbon Filter works for household odors from pets, cooking, wildfire, and VOC's, Pre-Filter protect Large particles like hair,lint and pet fur. 4.[EASY TO INSTALL]: Vital 100 or Vital 100-RF filter is very easy to install. No tools are required, brings convenience and comfort in your life. For optimal performance, it is recommended to replace it every 6-8 months or depending the air quality and usage frequency.