At one time I was considering starting a "Leggings For Men" company. I would put sport images on the leggings: footballs, soccer balls, baseball, golf, cricket, ....
But I didn't, too bad.
Men wearing pantyhose for heat was popularize by a football game when the San Francisco 49ers played Chicago Bears on January 8, 1989 in a playoff game on an iconic cold day. 49es won.
I don't wear pantyhose, but I have many different different versions of leggings, from very thin to thermal versions for skiing under my bibb. Leggings a so much better that sweatpants, but I wear sweatpants to work in my garden. BWT: I have leggings on this morning as I write.
And @Puffer. many doctor's recommend pantyhose for people with leg circulation issues.