There is no set lifespan for a helmet.
Say someone has a helmet...but ride 2 months each year.
That doesn't mean after 5 years they need a new helmet.
The time to replace a helmet is after it is involved with any kind of hard impact.
That could mean after it's been hit in a crash...or dropped too many times in a parking lot.
The outer shell of a helmet is made of very strong, durable, and lasting materials.
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