Swiffer Heavy Duty Wet Mopping Pads trap + lock 50% more dirt allowing you to quickly and easily clean all your hard floor surfaces. vs. Swiffer wet mopping pad. Contains no phosphates.Trap + lock 50% more dirt vs. Swiffer wet mopping cloths. Dirt magnet strip funnels dirt & liquids into the pad's center and off your floors. Scrubbing strip breaks apart even the most stubborn dirt.