For a test, I bought some from eBay. About $12 delivered. They are actually WAY better than I expected. Anyway, the results were odd. Seemed about the same turbulence until I moved my head about half a helmet width to the left and then pure bliss. Move it to Center, turbulence again. Move it half a helmet width right and wow, terrible. Odd that the left side was great and the right was terrible. Anyone else ever see/feel that?