The 3D Efficiency are extremely strong with a secure hygienic collar for extra suction control and the technology is 20% more efficient than the old ones. Comes with AirClean filters for even cleaner air while vacuuming. The 9-layer filtration system collects the finest dust particles. The automatic shut-off mechanism closes the bag when opened to prevent unexpected dust loss. Suitable for S2, S5, S8, C1 and C3 series. Color: as shown Material: non-woven fabric Package Contents: 10 x Dust Bag 4 x Filter Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.