There was a time believe it or not when Formula 1 drivers raced without seatbelts.
Mandatory since 1972, today's seat belts comprise a six point harness, which van be released by the driver with a single hand movement.
But to strap a driver into position requires outside help and a forceful squeeze by the designated mechanic to ensure a snug and tight fit.
Force India's Harry Rush, who works with Esteban Ocon, explains how it's done.
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