Windblox - Wind Deflector for BMW Z3 No Hoops This is the number one rated BMW Z3 No Hoops wind deflector by WindscreenReview.net. Prevent noise and turbulence in the cockpit when driving top-down; causes no glare Warranted for life + 30 day trial period (with free shipping back from US addresses). Made for speed - this BMW Z3 No Hoops wind deflector is rated for usage up to 150 MPH. Wind deflector never yellows from accumulated sun exposure. Made from premium double sided AR Polycarbonate, the best available material for this application