"O-Cedar's EasyWring Spin Mop refill effectively and safely removes dirt with just water! Each mop refill has hundreds of soft absorbing 100% microfiber strands that will not damage or scratch your hardwood or tiled floors. Our refills are machine washable and reusable. The triangle mop head design allows users to clean corners and hard-to-reach places. Refills can be used wet or dry to mop or dust hard surfaces making them a versatile cleaning product. To remove refill, step on microfiber strands and pull mop handle up to separate base from mop head. To replace refill, align microfiber mop head with base and push down until it snaps securely in place. To wash, machine or hand wash and lay flat to dry.