HQRP 2-Pack Foam & Felt Filter Kit for Shark Rocket HV300, Deluxe HV310 Series, XFFV300 Replacement Coaster HQRP&reg; 2-pack Foam & Felt Filter Kit plus HQRP&reg; Coaster; Washable and Reusable; Absolutely Essential for Allergy Sufferers; Change your filters every 3 to 6 months for optimal performance of your vacuum; Compatible with Original filter; 2 weeks DOA replacement warranty!