Red Hat

The Red Hat is a vanity item equipped on the Social Helmet Slot. It has a 100% drop chance from the Clothier NPC.

The player's weapon(s) will affect The Clothier while wearing the Clothier Voodoo Doll in an accessory slot, but it does spawn Skeletron (this can be avoided by unequipping the item).

Another method is to lure an enemy into him (the Goblin Army event or a lava trap are some easy methods if you do not have the Clothier Voodoo Doll. However, lava will destroy the hat, so be careful using a lava trap unless it's a very thin layer (enough to kill him but not burn the item).

Yet another method is to use Rotten Eggs, obtained from a Goodie Bag during Halloween. The eggs damage all NPCs under any circumstances. If using this method, Frost Armor is recommended, as its set effect will inflict the Clothier with the Frostburn debuff.

Trivia

 * While wearing the Red Hat and speaking to the clothier, he will sometimes say that the hat looks familiar.
 * Despite its name, the Red Hat can be dyed. However, the Clothier still says that it is red, as if it was not dyed.