I suppose for some it could be a "back to the basics" thing, but it is more about physiology and the best way to move. As such, there is really no reason to avo

I suppose for some it could be a "back to the basics" thing, but it is more about physiology and the best way to move. As such, there is really no reason to avoid the small improvements that do not affect the mechanics. Such as a thin kevlar layer underfoot.