These are machine washable Microfiber refills for your swiffer or Clorox Ready Mop. They do a great job on your floors. Easily attach to your swiffer mop/readymop in seconds. Use them dry for dust-mopping or dampened with water, or your favorite cleaner, for damp-mopping. Just toss them in the wash with your other Real Clean Microfiber cleaning cloths. These can wash up to 1000 times before replacing them. They absorb nine times their weight in water so they can hold a lot. Swiffer Mop must have velcro or tabs to attach these pads to the frame.