What is ""หมวกกันน็อค"" in American English and how to say it?

Thai

หมวกกันน็อค

หมวกกันน็อค-racing helmet.svg
American English

racing helmet

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Example sentences

American EnglishThe temperature in the cockpit rises so high during the race, that drivers are known to lose up to five pounds by sweating.

How ""หมวกกันน็อค"" is said across the globe.