All our fabrics are made to endure the outdoors and repel stains, however, to maximise their resilience, we do recommend to treat them with Fabric Guard 303. This is the only product recommended by and for Sunbrella, Glen Raven and Agora. 303 Fabric Guard creates a powerful shield to greatly increase repellency and protect against oil and water-based stains. Apply to clean and dry fabrics and reapply every time you wash your covers. Fabric Guard 303 can be purchased directly from Osier Belle.