Nightshirt Flannel

nightshirt
nightclothes worn by men
A long, loose shirt worn in bed.
A nightshirt is a garment intended for sleeping in. It is somewhat longer than most regular shirts, reaching at least down to the thighs, but usually shorter than a dress or robe, leaving some of the legs uncovered.
A long, loose shirt worn to bed

flannel
A washcloth
A kind of soft-woven fabric, typically made of wool or cotton and slightly milled and raised
Men's trousers made of such material
a soft light woolen fabric; used for clothing
washcloth: bath linen consisting of a piece of cloth used to wash the face and body
(usually in the plural) trousers made of flannel or gabardine or tweed or white cloth