Quote Originally Posted by ChickWithBrains View Post
Who publishes the "5 year rule?" Unless it's one of the safety regulatory agencies, you have no recourse with the manufacturer or seller of the helmet.

And why would wearing or not have anything to do with the rate at which the helmet material ages and fatigues? Of course, after any crash with head impact, a significant drop (from a shelf to the floor), etc., they need replacing because the stress can make it far less safe - but as far as inherent structure and strength, age is age. That you had it on your noggin or in a box for [x] years should make no difference.

Any thoughts?

UV and Ozone break down the styrofoam