HQRP Replacement Pre-Motor (Foam & Felt) Filter Kit works with Shark Navigator vacuum cleaner. <br>Replaces part # XFFT580. <br>Compatible with Shark Navigator NV580 series NV581, NV581Q, NV585, NV586 Powered Lift-Away Vacuum Cleaners.<p>Wash the pre-motor filters every 3 months. Be sure all filters are completely dry before placing back into your vacuum. Do not operate the vacuum with wet filters! Tap loose dirt off filters between washes as needed. <p><b>PLEASE NOTE!!!</b> This filter set is NOT compatible with the Shark Navigator Lift-Away NV350, NV360, NV370, NV390 series or part number XFF350.