Clothing is important. It can tell you a lot about a world. It can also TOTALLY throw your readers out of a story. It's useful to think about things like "how rare is this fabric?" and "what technology is used to weave/knit this?"
"Would this character have access to these clothes?"
"What does this character's access (or lack) say about them?"
"What does this character's comfort with these clothes (or discomfort) say?"