They are expensive ... $200 or something each. But you can talk to another person with the same helmet or pair to your phone, and the sound is really good. By that, I mean I can hear it really well ... the sound itself is thin and not great for rich bass or full sound but whatever---I'm just listening to audiobooks. For that it's awesome.
I tried aftershokz, noise cancelling earbuds, regular earbuds, etc. and nothing else worked with all the noise from the wind and traffic.