Why did people in the US and UK during the 1800s wear so many layers of clothing – not even switching it up for sports, hiking, or heat?

by fatuglyandgross

Example of a summer day: https://images.app.goo.gl/b4dVomuUNTJm9zct5

Tennis example: https://images.app.goo.gl/84CxkVNpuNRmNugd7

Hiking: https://images.app.goo.gl/rC9EZ9WZf3nEee977

What about heat, mud, sweat, smells, mobility, and comfortability? Was it style over everything, back then?

MableVaNtErsomBR

While you wait for an answer, this thread by u/mimicofmodes answers some aspects of your question.