I honesty do not knoq what it is about this particular version.....but when in flow state racing downhill, its kinda weirdly perfect in the ear bud. If im on it.....only need 3mins and 18 secs of it. But just as the piano sets in......just a blur man (and woman). Just one with the bike and displacing "tired" theough my body where its not. Not being scared.....you knoq the trail. Just flow.......