Which fabric needs to be washed most rarely?

Question

In other words, which doesn't readily retain dirt or smells?

Answer 1

Wool.... Not because of dirt or smells, but because it shrinks drastically.

Answer 2

Heavy satins and chince(not sure of spelling) are the ones most people like for furniture. I have seen a lot of custom made furniture and most customers preferred these types of fabrics for their durability,odor and stain resistance. Chinces are fairly expensive but are well worth it.