Does anyone have any experience with the product from Slipstreamz called a Spoiler? It's a little plastic device that somehow fits to your helmet strap and helps to divert air flow past the ear, thus reducing the noise of air rushing past your ears. I'm not overly bothered by windrush, or whatever you want to call it, but there certainly are times when I'm riding into the wind for example, or going downhill fast, that it gets a tad annoying, not to mention the reduced safety aspect of interfering with hearing traffic coming from up behind. I did a little experiment the other day while riding my bike by putting my index finger vertically along side my face just in front of my ear, and it certainly does diminish the noise of air rushing about the ears by a fair degree. So I'd imagine that the Spoiler device might work in a similar way?? The product can be viewed at http://www.slipstreamz.com.