The VacMop pads from Shark are easy to snap on and when they need to be replaced, they release with the push of a simple button.  The disposable “floor pad” actually has a compartment which holds the debris that has been vacuumed up. The compartment has a flap to keep the debris from falling back out and is clear so you can see if it is full. The bottom is a soft, slightly textured cleaning pad, measuring about 5x9 inches.  It becomes necessary to replace the pad either when the debris compartment is full or the bottom pad is worn out. Personally, I am able to vacuum multiple rooms and then mop them a couple of times before replacing the pad. Enjoying using it on both tile and hard wood floors!