PERFECT FIT: The Pocket Mop Pad features a convenient hook and loop strip closure, ensuring a secure fit with Shark Steam Pocket Mop models including 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. UPGRADE REPLACEMENT PAD: This double-sided microfiber thick nap pad enhances your cleaning experience by effectively removing dirt, grime, and stubborn messes without the need for harsh chemicals, allowing for longer cleaning sessions. OPTIMIZED FOR STEAM MOPS: The innovative sandwich mesh lining promotes efficient steam release, while its strong water absorption ensures quick drying. It effectively tackles tough and sticky messes, while also trapping and locking pet hair. SAVE MONEY, SAVE THE EARTH: Our reusable steamer pads are machine washable, making them an eco-friendly choice. They are suitable for various sealed hard floors, including wooden floors, ceramic tiles, laminate, and marble. BUYER NOTICE: Please note that this is a standard size mop pad measuring 12.6 x 7 inches (32 x 18 cm). It is NOT compatible with XL/extra large mop heads (16 x 6 x 1 inches) or models with one wider and one narrower rectangular mop head, such as S3501, S3601CO, or S3801CO.