General description The 12 Pack Vacuum Cleaner Bags for iRobot Roomba are designed for various models including i7, i3, i4, j7, S9, and more. Made from high-quality materials, these dust bags ensure effective filtration and durability, making them a reliable choice for maintaining your vacuum cleaner's performance. Technical specifications Material: 2 layers of fine fiber filter and 2 layers of non-woven fabric Filtration efficiency: 99.99% of dirt and dust particles Quantity: 12 dust bags Compatibility and accessories Compatible with iRobot Roomba models: i7, i7+, i3, i3+, i4, i4+, i6, i6+, j7, j7+, i8, i8+, S9, S9+, E5, E6, E7 Perfectly replaces original bags Installation Easy to install like the original accessory Simply remove the used dust bag and replace it with a new one Usage Recommended to replace the dust bag every 2 to 3 months Large capacity allows for at least two weeks of vacuuming without replacement