garb

An outfit or set of clothes that someone wears can be called their garb.

When we talk about someone's garb, it's often referring to the way they dress or present themselves to the world. Think of a character from a movie or book - their costume is an example of their garb. If you're thinking about a group of people, like soldiers or monks, their uniform is also an important part of their garb. The word can even be used more generally to describe someone's style or fashion sense, so if someone says "that's not my usual garb", they might mean that outfit doesn't normally fit in with how they like to dress.