In real life, we sometimes make decisions about people based on what they wear. Same goes for your characters. Of course you won’t detail every single bit of their clothing—readers get tthe shorthand about why you chose to have your character wear pressed khaki pants and a crew neck sweater versus an untucked plaid shirt over ratty jeans.
Clothing as shorthand.
So let’s say your character decides to wear this jacket. Why would she (or he) do that?
Would this jacket be in their closet at all? If so, why? And where did it come from?