Why is it called a trucker hat?

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Tags

1. #truck
2. #workers
3. #companies
4. #1960s
5. #because
6. #farming
7. #sometimes
8. #during
9. #trucker
10. #rural
11. #supply
12. #farmers
13. #netback
14. #promotional
15. #known
16. #gimme
17. #other
18. #baseball
19. #drivers
20. #originated
21. #style