Green - An environmentalist community

That's not necessarily true though when it comes to single material fabrics these days believe it or not! You can buy 100% cotton at a lower price point than lots of synthetics. Pick a store really. For example Old Navy is pretty cheap - they sell 100% cotton shirts, denim, shorts, etc. they also sell synthetic blends, and the pricing is more a function of style than anything. Jump to a higher tier like JCrew - same is true. Nordstrom. Bloomingdale's. Designer boutique. Hell look at jeans. You can get full denim 501s and wrangler on the same shelf as synthetic, same brand and price point. You can get incredibly well made Flanels that are cotton/tencel blends from brands like Patagonia, kuhl, or Fjallraven, or you can get a 60/40 poly/cotton blend from faherty for more money. And in all these cases, what holds true is they'll last you longer, no matter what price point you picked.

It also swings the other way where you can buy much more expensive 100% cotton items at a huge markup over synthetics. Look at reigning champ as a good example - same cotton everyone else uses, huge markup for reasons that their customer base feels are fair enough to keep paying for their stuff. You can also buy synthetics at a huge mark up way over those already marked up cottons. Many designer brands want you to wrap yourself in a 35% polyester, 30% spandex sweatshirt for $400.

One caveat is that in general, finding single material fabrics is all around more difficult for women than men, mainly as a function of style trends. But even that's swinging the other way currently.