The material room could be called "material editor". That is, there are some material presets around, but (at least for me), I prefer to play around with all the nodes and stuff and make my own materials.
I think there are indeed no "stock" materials for the bra and jeans. But try and play around with the nodes, you'll be surprised at how many things you can do just tinkering around.

still hooked to real life and enjoying the siesta!
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