Another often underused aspect in post-apocalyptic fiction: clothes
In olden days, before industrial clothing manufacturing was a thing, people used to own a single set of clothes. Medieval wanted posters and missing posters often described people by what clothes they wore, because the idea of them switching clothes as unlikely. Giving somebody new clothes was a big thing, and giving them your clothes as collateral meant you put a lot of trust in them.
In a post-apocalyptic setting, where the industrial and agriculture industries that are responsible for our abundance of clothes (cotton, wool, mechanical weaving, etc) don’t exist anymore, things are ought to be similar. People would own a single set of clothes, maybe a few if they collected some old world dresses that haven’t burned up or got eaten by mutant moth.