Felt Filter Sock with Plastic Ring - RedSea - Bulk Reef Supply
Think Crucial HEPA Style Filter, Foam and Felt Filter Kit Replacement for Shark NV80 UV420, Compatible with Part XHF80 and XFF80 XHF80 - The Home Depot
1 Yard x 72" Polyester Felt Filter Media Fabric Sheet 0.5 Micron PTFE Coated - Walmart.com