- The Cyclone Dirt Trap bucket insert sits at the bottom of your bucket while you wash filtering water non-stop. - The cyclone Dirt Trap help eliminates wash swirls and scratches with Cyclone Dirt-Trap Filtration Technology. - The round wash screen separates abrasive dirt and silt from clean and soapy wash water with scores of cyclonic dirt funnels. - Separating dirt from clean and soapy water keeps abrasive debris off the wash mitt, and therefore off the paintwork for a scratch-less car wash. - The cyclone funnels of the Dirt Trap separate dirt through centripetal force and push it through tiny holes underneath the wash screen. - The dirt remains trapped underneath the funnels and cannot easily flow back up through the tips once the mitt is pulled out from the water. - The one way Cyclone Filtration system is a passive filter that never needs replacing and does not rely on moving parts, no disposable filters, and requires no maintenance or energy to set up, use, or store.