Multi-layer Air Filtration: An air filter system consisting of 2 melt-blown fabrics and 2 non-woven fabrics, the 4-layer filtration keeps the vacuum cleaner in good performance and locks the dust in the base to protect your family's health. Safe and Effective: Holds up to 30 bins of dirt while keeping the dust bin clean. A self-sealing design keeps dust inside and prevents dust from flying away when emptying. We suggest replacing the disposable dust bag every 1-2 months, this item can be used for over 1 year. Compatible with all Clean Base automatic dirt disposal models, including for S9+, I7+, I6+, I3+, I4 plus, I3 Plus, I4 Plus, I6 Plus, I7 Plus, S9 etc. Fits well to keep your vacuum cleaner powerful and durable. As part of routine maintenance, accessories are easy to disassemble and replace. Color: White+grey Material: Non-woven fabric Package Contents: 8 * Dust bag 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.