What do players of American football wear helmets? Write the response as if your are an American explaining to a coworker from another country.
American football is a high impact sport where injuries such as concussions are very common. The helmet is meant to lesson the occurrence of traumatic brain injuries like concussions by providing padding to the skull. The helmet is hard shell on the outside with soft padding on the inside. Players are required to wear them anytime they are on the field of play. Helmets were originally made of leather but over the years improvements have been made to better protect players.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
What do players of American football wear helmets? Write the response as if your are an American explaining to a coworker from another country.

user
American football is a high impact sport where injuries such as concussions are very common. The helmet is meant to lesson the occurrence of traumatic brain injuries like concussions by providing padding to the skull. The helmet is hard shell on the outside with soft padding on the inside. Players are required to wear them anytime they are on the field of play. Helmets were originally made of leather but over the years improvements have been made to better protect players.
assistant