High-quality materials: Made from two layers of fine fibers and two unusual fabrics. Shock-resistant: Dense fabrics ensure that the dust bag is completely durable and will not be damaged by sharp objects inside. Additionally, there is an opening/closing flap that prevents dust and pollen from escaping. Generous design: The designer-designed sliding door features a secure closure to ensure that the dirt accumulated inside the iRobot Roomba i7 does not escape. In case of allergic reactions, this means that fine dust allergens are removed from the room air. Healthy lifestyle: We recommend replacing the iRobot Roomba replacement kits every 2 to 3 months. This ensures the vacuum cleaner's cleaning efficiency and reduces the amount of dust, pollen, and other allergens that spread in the air.