What do you wear when you sleep?

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i prefer to wear very loose fitting night shirts with short sleeves and that come to about knee length. i cannot sleep in anything long sleeved or long night gowns. i cannot wear pajama pants either or anything on my feet. i feel very confined. i am a bit cold in the winter so i use extra blankets. i actually prefer to sleep nude but i worry about if something were to happen in the middle of the night and i had to get out of the house fast that i would have nothing on! what is your favorite thing to wear to bed?