The Vileda Professional Roll-O-Matic sponge mop refills are manufactured in the USA. the new "Advanced Technology" foam allowing 25% more liquid absorption and two times more liquid release than competing foams. Each refill is Individually packaged and lot number controlled. All Vileda Professional brand refills are ideal for use with the "Pull and Lift" technique most commonly used in controlled environments. Refill will only fit Vileda Professional Roll-O-Matic handles.