Hello Natalieg, sorry to hear of your allergic reaction to fabrics - I hand wash all fabrics up to 4-5 metres long before use and hang them in the shade to drip dry, then iron when quite damp, thus removing all wrinkles.
My granddaughter is allergic to dust mites and I had severe reaction to antibiotics a couple of years ago so needed to be 'challenge tested'. At same time bought woollen underlay for bed which was made in China so there was concern as to where I might have picked up anything (we had learned about laminate in baby milk powder etc in China then).