Dreame Z10 Pro Dust Bag is made of highquality materials for durability. Equipped with a 4L bag, that can hold up to 65 days of litter and reduces the number of dust bag replacing frequency. It has a ventilation layer, which filters out different levels of dust and debris to provide maximum capacity and durability. As part of normal maintenance, this accessory can be easily removed and replaced. Each purchase contains 5 dust bags.