A "wind blocker" is something that prevents or blocks the wind from reaching a certain area or person, helping them stay protected and comfortable. Full definition
Power Convertible Retractable Hard Top w / Lining, Glass Rear Window, Automatic Roll - Over Protection and Power Wind Blocker (schumachermb.com)
Roadsters come with an electric wind blocker along with its power - operated top, while the higher - performing 2018 Audi TTS comes with adjustable suspension, larger wheels and tires, and TTS - specific styling. (kbb.com)
Meanwhile, air turbulence in the cockpit is well controlled, too, especially with the rear - seat wind blocker in place. (edmunds.com)