Review on Cat Ears AirStreamz Cycling Noise Reducer by Jeremy Choi

I definitely hear some reduction in wind noise, but I'd say they only work "moderately". Part of the drop in performance is because I often ride drops with my head down. As a result, the wind does not blow directly in front, but partly over the edge of the helmet (like diagonally from above). This is obviously not a direct fault of the product, but makes it less useful to me. And since the material costs are well below 1€, I find the price a bit high. I'll probably look for similar material and experiment with a windshield that suits my riding style better myself.