HQRP Foam and Felt Filter Kit for Shark Navigator Deluxe UV400 UV400_26 Upright Vacuum Coaster HQRP Foam and Felt Filter Kit 4-Pack Replacement; 2 Foam Circular Filters, 1 Felt Circular Filter, 1 Felt Exhaust Filter; Do not operate the vacuum with wet filters; Compatible with Original filter; 2 weeks DOA replacement warranty!