I drive a Honda CB Seven Fifty. A classic naked bike where the swirls around the clock almost hurts at a leisurely pace. Although my Caberghelm contained relatively well, it was too loud to me. These plugs one notices immediately a noticeable reduction in noise and the great thing is that you can still talk, without removing the helmet. The filters actually do a good job. So who it like me going - this is the cheaper alternative to the expensive helmet purchase!