Leggings

[fairycakes69]

I know this is a bit ramdom but, do you class leggings as trousers or underwear? I say trousers, 18 year old daughter says underwear. Also how do you keep them up, I have just started wearing them ( I still remember them from the first time round in the 80's) they are so comfy but I spend all day hauling them up, it's not a good look. They are the right size, so its not that they are too big. I am considering braces.