COMPATIBLE MODEL - Our Vital 100S replacement filter is compatible with Vital 100S Smart True HEPA Air Purifier. Compared to Part NO. Vital 100S-RF. We always maintain the same effectiveness and efficiency as the original filter to keep indoor air fresh all the time. (NOT FIT for VITAL 100 Air Purifier, Please check the purifier model before purchase) 3 STAGE FILTRATION - The premium Vital 100S replacement filter for adopts a 3-in-1 H13 Grade True HEPA Filtration System ( Nylon Preliminary Filter (Comes with Machine ) H13 Grade True HEPA Filter High-Efficient Activated Carbon Filter to fil-ters 99.97% of airborne particles down to 0.03 Micrometre in size, automatically improving air quality . UPGRADED HEPA SMART TECHNOLOGY - Our NEW Vital 100S HEPA Filter is used than low-grade materials and can achieve a better purification effect than traditional general HEPA. The HEPA filter of the 3-in-1 filter attaches at least 99.97% of dust, pollen, and any airborne particles with a size of 0.3 Micrometre (m) COMPACT FOR EVERY HOME - Enjoy fresh air all year round with our Vital 100S Replacement Filter for your air purifier to ease uncomfortable symptoms caused by problematic air. The H13 true Hepa filter works alongside the new pre-filter and high-efficiency activated carbon filter with 60% more activated carbon and unique ARC Formula to take out 99.97% of the airborne particles as small as 0.03 Micrometre and helps absorb pet odors, fumes, and VOCs. COST EFFECTIVE - Vital 100S replacement filter for air purifier with h13 true HEPA technology and high-efficiency activated carbon adopts advanced lower energy consumption and lower density structure by the manufacturer, with lower wind resistance, higher efficiency, and less pressure to maximum effect. The upgraded electrostatic electret filter technology helps the 3-stage filtration system last longer. WARM MAINTENANCE TIP - We recommend replacing your filter for 6-12 months, but earlier or later depending on how often you use your air purifier. Using your air purifier in your live environment with relatively high pollution may mean you will need to replace the filter more often Colour: White Material: plastic Package Contents: 2*filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.