Long Sleeve Nightshirt

long sleeve
a sleeve extending from shoulder to wrist

nightshirt
A long, loose shirt worn in bed.
A long, loose shirt worn to 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.
nightclothes worn by men