FJ HydroKnit is a 100% waterproof shell. Combining lightweight fabrics with a specifically engineered 3 layer bonded knit fabrication makes this outerwear piece one of the lightest garments ever produced by FJ. Seam sealed for complete waterproofing. FootJoy warrants that this piece of outerwear will be 100% waterproof in normal use for two years (U.S. Warranty). Side pockets allow for hand comfort and warmth. A Durable Water Repellent Finish helps keep you dry during mist or light rain conditions. 100% Polyester.