The $400,00 very advanced F-35 helmet you don't know

Helmets for pilots have been around for almost as long as aeroplanes themselves.

Safety equipment has evolved throughout time, but it hasn't always been up-to-date.

Motor racing helmets were used by pilots in the early days.

Some of these pieces were altered to accommodate radio earphones and goggles during World War II as a minor modification to their original design.

During and during World War II, aeroplanes advanced as a result of altering conditions.

The pilots required stronger protection as they flew at higher altitudes.

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