303 Fabric Guard Water Repellent Protect your marine fabrics from harsh weather conditions with 303 Fabric Guard. This 303 waterproofing spray can effectively be used on a variety of fabrics such as wool, silk, and garment-grade leathers including suede. 303 Marine Fabric Guard also helps restore a fabrics diminished water and stain repellency, bringing a variety of outdoor boat fabrics to like-new conditions. Fabrics that are treated with 303 Marine Fabric Guard are resistant to soiling and mil