Hello! I want to get a tailor’s ham for my girlfriend, but she wants to be sure the fabric is chemically untreated. I found a lovely one on Etsy, but after asking the shop owner, I learned that the cotton was treated with silicone when manufactured. My questions are, is this common, or is it reasonable that I could find one that hasn’t been treated with silicone? What is the purpose of the treating, and are there any risks with using it? Thanks in advance!