It depends but normally panties or shorts and a t-shirt. I will take the shirt off if I get the night sweats and itchies. I have shorts by the bed just in case.
I wear a tank top and cropped (just below the knee) leggings. My clothing has to be tight otherwise I feel it rubbing against my skin when I move and breathe and I can't sleep.
I wear a short or medium length nightgown and undies
I'm always warm in my sleep, even in the winter so can't wear anything heavy and I can't tolerate any kind of pajama pants when I'm sleeping. They drive me nuts!