Yep! This is what Gnats was referring to. Not necessarily the same manufacturer, but these indeed are the "plastic slats" that he was referencing.
We have these at our facility and it allows for wind passage and provides a backdrop at the same time. I think they've been quite good, and when heavily applied, are fairly attractive. One downside is to make sure that you cut them about 4 to 6 inches off the ground, or they also make a horizontal piece to hold them up. Occasionally one will slide down a bit and get caught in the field drag (when we drag the warning track).