I guess I'm super-sensitive about noise. What I can't understand is, why helmet designers don't seem to even TRY to reduce wind noise & turbulence? C'mon, why not just a cool-looking little airfoil near the ears? The noise of years & years of 2-hour road bike rides has got to be damaging. Plus, reducing noise also means reducing drag! I fabricate dorky little ear covers made of old sunglasses. They actually help me hear cars (keeps wind from masking). I've seen the Slipstreamz thingys but can't see how they'd be better in a stiff crosswind.