Powerful enough to protect fabrics in the harshest environment ...outdoors. Yet 303 High Tech Fabric Guard is safe for the finest fabrics, wool, silk, and fine leathers - including suede. On outdoor fabrics, 303 High Tech Fabric Guard restores lost water repellency and stain repellency to factory new levels. 303A(R) High Tech Fabric Guard(TM) is a premium patented formula that restores fabrics lost water and stain repellency. Recommended as the best fabric protectant by leading outdoor fabric manufacturer SunbrellaA(R). Proper maintenance with 303 Products will add to the life of your fabrics, save you money, and ... It&';s Easy ! Restores water and stain repellency back to factory new levels Impedes mildew formation Protects against both water and oil based stains Prevents leaks and resists soiling Treated fabrics remain breathable