Why do runners wear shorts over tights?

Related questions

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4. Are all leggings the same?
5. What should a beginner wear for yoga?
6. What's the difference between spandex and yoga pants?
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10. Are leggings going out of style?

Tags

1. #tights
2. #double
3. #prefer
4. #throwing
5. #leaves
6. #common
7. #reason
8. #imagination
9. #shorts
10. #something
11. #runners