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A few points: Synthetic clothes (ie manmade fibres like polyester) are mostly made of plastic which is really really bad for your skin and your hair, especially if you have eczema. Non-synthetic clothes pack more bang for their buck when it comes to protecting you from the weather - a thin wool jumper does so much more than a bulky polyester one, a cotton top will let your sweat out which is so much better for both s…
What about blends? Pure wool is pretty itchy, pure cotton shrinks, pure silk is time-consuming to launder, and pure linen is very prone to wrinkles.
Good quality silk can go in the washing machine at 40 degrees in wash bags (although where I live it is not normal to use tumble driers, we just hang clothes outside or on radiators. So I do not lose any time by hang drying silk because I do it with all my clothes anyway). Never had the shrinking issue with cotton interestingly, but do find cotton/elastic blends are not as durable as more synthetic options. Cotton is something that can have wildly varying qualities and be constructed in completely different ways. I hate wool to be honest. And most linen I have come across has been weirdly see-through? Although linen is good upholstery material in my opinion.