You can find companies that specialize in natural fabrics but you will pay for the quality. The upside is having a smaller closet with clothing that lasts. I have found most of such clothing either thrifting, handsewing/knitting, on Etsy, or just with paying attention in retail stores (some will offer better fabrics, but some will only carry the plastics and aren't worth looking into). Occasionally I have splurged on a beloved new piece. Just like food, read the labels 😉