Wind Restrictor is an amazing, unique, and durable product that blocks as much, if not more, with turbulence than the factory OEM mesh net windscreens and helps to maintain the temperature inside of your roadster when the top in down. It can remain in place with the convertible top up and is mounted solid, yet inconspicuously without any permanent alterations. Made from double-sided AR Polycarbonate, and very durable acrylic type material is also scratch resistant!