FJ HydroLite X Golf Rain Jackets are designed for warmer playing conditions with specifically placed knit panels in arms and back for increased movement and flexibility in the golf swing. Make Every Day Playable with Tour-Proven FJ Golf Outerwear. This performance fabric offers extreme comfort and allows complete range of motion during the golf swing. The HydroLite System is a 100% waterproof shell. Combining lightweight fabrics with a bonded liner, makes this performance piece the lightest garment ever produced by FJ. Seam sealed for complete waterproofing. FootJoy warrants that this piece of outerwear will be 100% waterproof in normal. A waterproof front zipper allows for easy-on and easy-off wear, while protecting you from the elements. Precisely placed knit panels will maximize stretch at key points during your swing for added flexibility. 100% Waterproof protection with a 4 way stretch shell to keep you dry in any playing conditions.