How many times can you use a helmet after the inner liner has been dropped or compressed?

A helmet is designed to provide maximum protection during a motorcycle accident, and its inner liner plays a crucial role in absorbing impact. When the inner liner of a helmet has been dropped or compressed, it can lose its protective capabilities. The materials used in helmets, such as foam, are engineered to compress during an impact, thereby dissipating energy and protecting the skull.

Once the helmet has been compromised by a drop or compression, it may not be able to adequately absorb forces in the event of a subsequent impact. There is no guarantee that it will perform as intended, which is why it is recommended that a helmet be replaced following an incident that alters its structure, including drops or casual compressions. The integrity of the helmet is paramount, and using it thereafter puts the rider at an increased risk of head injury.

Therefore, the correct answer emphasizes the importance of rider safety, stating that a helmet should not be used at all after the inner liner has been compromised.