there are skullcandy ones made for giro, and a couple other brands made for smith, etc. they are all basically the exact same, they are all (for the most part) compatible across brands, I have a red helm, but went through 4 pairs of red speakers before just giving up and going with the skullcandies - which get horrible review from everyone (as a brand) but for helmet dropins they work, which is alot more than i can say for the redphones i tried.
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