Locks away tough dirt. Pad attaches easily to the bottom of the WetJet mop. Super absorbent core traps dirt and solution, getting them off the floor and out of the house. 1 pad is normally good for about 325 sq ft, depending on conditions. Replacement pads for the Swiffer WetJet starter kit. 3-1/2 In. W. x 6-1/2 In. L.