Swiffer WetJet multi-Surface mopping pads have an ABSORB + LOCK STRIP that helps trap dirt & grime deep in the mop pad, so it doesn't get pushed around. Safe for finished wood floors*. *Do not use on unfinished, oiled or waxed wooden boards, non-sealed tiles or carpeted floors because they may be water sensitive. ABSORB + LOCK STRIP helps trap dirt & grime deep in pad so it doesn't get pushed around For best end results on your hardwood floor, use with Swiffer WetJet Spray Mop and Swiffer WetJet