Swiffer Sweeper wet mopping cloths are designed with a unique cleaning solution that works to dissolve tough spots, dirt and grime and pull it deep into the cloth and off your floors. They are even safe to use on hardwood floors.* *Do not use Swiffer Sweeper wet cloths on unfinished, oiled, or waxed wooden boards, non-sealed tiles or carpeted floors.Unique formula traps and locks dirt deep in cloth With Gain Original Fresh ScentDo not use on unfinished, oiled, or waxed wooden boards, non-sealed tiles or carpeted floorsTIP: Use one wet cloth with Swiffer Sweeper and two cloths with Swiffer Sweeper X-Large