Category: sleepwear...

looking good while you sleep
ankle-tickling sleepwear and fuzzy chenille socks
pajamas were introduced in England as lounging attire in the 17th century but went out of fashion, reappeared in 1870 in the Western world as sleeping attire for men
at the beginning of the 20th century, pajamas were introduced as women's sleepwear and about 1920 as at-home evening wear
One morning I shot an elephant in my pajamas. How he got in my pajamas, I don't know. We tried to remove the tusks but they were embedded so firmly we couldn't budge them. Of course, in Alabama, the Tuscaloosa but that is entirely ir-elephant to what I was talking about. (Groucho Marx, Animal Crackers)
babydoll, blanket sleeper, chemise, negligee, nightgown, nightshirt, nightcap, peignoir, pajamas, slip nightgown
pyjama or pajama entered English around 1800, first as loose trousers, usually of silk or cotton, tied round the waist, and worn by both sexes in some Asian and Middle Eastern countries; subsequently nightclothes consisting of loose trousers or shorts and a jacket or other top