Naughty nightwear (Fallout 3)

 is a set of leopard skin pajamas found during the quest, Grady's Package, in Fallout 3.

The outfit can be repaired using various "pre-war" and Merc outfits including Pre-War Hats.

Unmarked quest: Grady's Package
A humorous side quest (actually a sub-plot to the Nuka-Cola Challenge) involving the Naughty Nightwear, which can be found in Marigold Metro Station, which is near Grayditch.

Bugs
One person reported that while wearing it it read in effects Naughty nightspeech because it offers a speech bonus

This is not so much a bug as a bonus; Upon obtaining this nightwear from the safe DROP IT right away. When lug nut asks for it say i don't no trouble etc. He then magically spawns a fully repaired verion into his gruby little inventory. Simply pick yours [the origional] back off the floor. Take the fully repaired version. If you desire keeping them this may be a good idea, as +10 speech is handy. It does look odd when using buttons wig in conjunction {speaking of which why does the rivet city collector not buy buttons wig?}. Sell the damaged one to it's intended owner for full price (double with speech), as this is a rare item it also makes a nice display peice for those who like to decorate the house.... other than with mutilated body parts of course. When used with a high Charisma and the Black Widow perk this can really make a massive difference to speech attempts. It is potentally useful for stealthy characters too, as it's light and, thanks to the +10 speech, you can get what you want through speech before needing to kill anyone.