National Cycle Rain Zip Windscreen screen Treatment windshield N1410-01 keep your windshield clearer in rainy weather, National Cycle developed RainZip, a specially formulated rain repellent treatment that is safe to use on your Quantum hardcoated National Cycle Windshield (VStream, Wave, SwitchBlade or Heavy Duty). And, it’s safe to use on ANY motorcycle windshield, plus helmet faceshields and goggles. RainZip is hydrophobic — when rain accumulates on your windshield, RainZip will cause it to effectively bead up and blow away, even at riding speeds of only 20-30MPH. RainZip will give you a clearer view of the road ahead… especially when it’s wet! Watch the RainZip Demo Video to see well how it works.