303 Fabric Guard is a technologically advanced fluoropolymer-based fabric protectant that is powerful enough to protect fabrics under extreme outdoor weather conditions, yet gentle enough for safe use on delicate materials such as wool, silk and fine leathers, including suede. On automotive fabrics both inside and out, 303 Fabric Guard imparts long-lasting water repellency, resists everyday soiling and staining, impedes mildew formation and helps to protect such fabrics against harmful UV rays from the sun. Treated surfaces therefore stay cleaner and fresher looking for longer, reducing the need for future maintenance.