The ventilation layer of the dust bag filters out different levels of dust and debris to provide maximum capacity and durabilityImproves the elasticity of bags to prevent them from falling off when you handle dirt, dust and hairIt can remove 99.9% fine dust particles, protect the air in your living environment and ensure the service life of the vacuum cleaner99%Made of high-quality materials, environmental friendly materials, soft and durable to use.Easy to install and remove, no need to spend extra energy and time.Compatible with model: For VIOMI Alpha2 ProMaterial: Non-woven fabriccolour: whitePackage Contents:20 x Dust Bag/12 x Dust Bag/6 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.