Beneath his racing suit, each driver must wear fireproof underwear capable of withstanding 2,400 degrees Fahrenheit, the temperature of burning gasoline, for 15 seconds.
16 seconds sound clip from the Le Mans (1971) movie soundboard.
You can hear this line at 00:16:26 in the Blu-ray version of the movie.
Quote context
[...]
- Last year, the lap record was three minutes 22 seconds. The average speed, 145.508 miles per hour.
- There are 55 cars and 110 drivers representing countries from all over the world.
- They will drive day and night, through sun and rain.
- His blood type must be indicated on either suit or crash helmet.
- No one may drive more than four consecutive hours.
- For the first time in the history of this race...
[...]