HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. The filter can maintain the cleaning performance of the sweeper, while reducing the penetration of dust, pollen and other allergens into the air you Easy to : This filter is inside the dirt tank. Remove the dirt bin by firmly grasping it and pulling it out, to empty the dirt bin, find the release latch and pull it to open and empty. Take out the filter and then place the new filter back into the bin. Replacement Filter: A dirty filter will greatly reduce suction power. Depending on the vacuuming frequency and amount of dirt cleaned, for best performance, change the filter at least 3 to 6 months. Made of high quality material, more durable. Delicate and exquisite, highly match the equipment. color:white+black Material:plastic Package Contents: 4x Hepa 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.