Scratch Resistant Windshield by LovinMySling posted Sep 10, 2017 at 2:30 PM Spin4Air is now going with Scratch Resistant Optical Clear blades. We have stopped using the Standard Polycarbonate glass and will be using Scratch Resistant Optical. You will still have the feature of adjusting your blade with a twist of the knob. You can ride without losing your baseball cap and sunglasses. How about riding at HWY SPEED and hear the music coming from your stereo or how about talking with your passenger without yelling above the wind? Also it is to clean, but still recommended that you use NOVUS.