Compatibility: The mop pad is compatible with iRobot Roomba Combo J7+/J7 Robot Vacuum Cleaner. Please confirm your machine model before purchasing. High-quality Material: Made of high-quality microfiber, the mopping cloth has strong decontamination to remove dust & debris. It is recommended to replace it every 3-6 months for high-performance cleaning. Washable & Reusable: Mopping cloth can be machine wash and hand wash, with strong water absorption, high temperature resistant, no fading, no lint, easy drying. Notice: when machine washing, it need to be wrapped in package. Suit for different floors: The mop pads replacement also can be used on ceramic tile, wooden floor, marble floor,Laminate floor, cement,vinyl and so on, which will not scratch the floor and easy to remove dust. Package includes: 4*Mop cloth.