The dust bag is made of melt-blown fabric and non-woven fabric, combined with the cleaning station can effectively capture 99.7% of ultra-fine dust down to 0.3 tiny particles.It will lock automatically when you lift the dust bag, completely sealing the dust bag inlet to dust and dirt stay inside the bag.In order to keep your robot running at its best, please clean and replace parts in time. If you have allergies and pets , it is recommended to replace the dust bag every 2-3 weeks.Easy to install and remove, no need to spend extra energy and time.100%Made of high-quality materials, environmental friendly materials, soft and durable to use.Applicable vacuum cleaner models:QZ11A QZ11B QZ11C QZ11D QZ12GQW14B QZ12B QC11D QW13S-07J QZ14BQZ14H QW13T-07D QW12T4 QW12T5 QW12Z4QW12T-06G QW12T-07G QW12Z-07G QW12Z-02E QW12Z-06EQW12t-608 QW12t-607 QW12T-202 QZ14F QZ14S3QZ12E QZ13A QW12S-05H QW12S-05J QW12t-602Colour:Gray-blackMaterial:non-woven fabricPackage Contents:8 x Dust BagOnly 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.