The cleaning pads are designed for use with shark steam pocket mops S3500 series,S3501,S3550,S3601,S3601D,S3801,S3801CO,S3901,SE450,S2901,S2902,S3450,S3452,S3455K,S3501SPN,S3501WM,S3601C,S3601CO,S3601K,S3601Q,S3601W,S3601WC,S3901A,S3901C,S3901D,S3901FS,S3901K,S3901Q,S3901W,S3901WC,S3901WM,SE400. <br> The replacement pads are multilayer microfiber material for effective cleaning, strong water absorption, dry fast, without fading in high temperatures.<br> These washable, reusable and durable shark steam mops will give your floors a complete and thorough cleaning by attracting and trapping dirt, oil stain and grime for your daily use.