Wet Application Foam Filter for 3 to 4.5 Gal. RIDGID Wet/Dry Shop VacuumsThe VF3700 is a wet dry vac replacement filter designed for higher volume liquid pick up. This wet filter adds protection for your vacuum during wet pick up by keeping water borne debris out of the motor. This filter is also reusable and can be cleaned easily with water. Washable and reusable Foam filter with resin core cleans easily with water Adds protection for your vac during wet pickup by keeping water borne debris out of the blower wheel Simple