The Doctor's set

The Doctor's Clothes is a set of vanity items introduced in 1.0.5 patch, made up of the The Doctor's Shirt and The Doctor's Pants. They can be bought from the Clothier NPC the day after a full moon.

These items are all equipped in the Social slots as they only provide a visual appearance.

Trivia

 * The Doctor's Clothes looks like a reference to the Eleventh Doctor from Doctor Who