justanotherg20
Member
How much of your sweat gets to the foam though? Assuming you have pads installed (who wouldn't?), I would think you'd have to be sweating to the point of total immersion for that to happen. As for the plastic, again, I have my doubts that five or even ten years of direct sunlight exposure (not like it's going to actually be exposed that long anyway) is really going to do any sort or realistic damage.
I'm guessing it's the salt in your sweat that does the damage. Just like it will eat leather over time- which is why it's so important to clean your tack on a regular basis (for those of us who owned horses)... and why it's important to at least rinse out the inside of your leathers on occasion, as well.
I'm also guessing -- and this is absolutely a blind guess on my part -- it's kinda like expired medication. It's lost ten percent of its potency, which to me is still acceptable but to professionals, I assume, it is not good enough. So then the question becomes how much potency can a helmet lose before you feel it is no longer safe for whatever kind of riding you do? (I am assuming a helmet that just barely fell underneath race-worthy will still be sufficient for in-town commuting.)
