Review on 🚗 Red Big Car Wash Sponge: 1 Pack of OPT 22516 for Effortless Cleaning! by Garry Ortiz

Not sure about functionality. But it is recommended with ONR so I don't think about it. What the sponge does amazing is get rid of a bunch of dirty towels. sit in the car for about 15 to 30 seconds to allow ONR to do their thing; I then use a BIG RED SPONGE impregnated with ONR to safely remove the kicked up, smeared and encapsulated dirt from the paint, leaving my gunmetal gray car looking like gleaming titanium.