Here's what we know: The Giro Atmos is the undisputed greatest helmet ever made. It's the only one we want to sell because it's so much more comfy and breathable than any other helmet on the market, and its customization of fit is pretty much infinite. In fact, the only issue we've ever had with it is that its featherlight Coolmax helmet pads get a wee bit smelly after a long summer of riding. It's not an Atmos-specific problem -- in fact, all helmets get a bit ripe after a year or two. What makes Giro so great, though, is that they offer replacement helmet pads. Identical in every way to the pads that come standard in a new Atmos, installing them makes your helmet feel (and smell) brand new.