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. 303® High Tech Fabric Guard™ is a premium patented formula that restores fabrics lost water and stain repellency. Recommended as the best fabric protectant by leading outdoor fabric manufacturer Sunbrella®. Proper maintenance with 303 Products will add to the life of your fabrics, save you money, and ... It's Easy !