Stinks of chemicals - polyester backing

I thought this was 100% cotton so was surprised to take it out of the bag and have such a strong chemical smell. I thought it was just packing smell so washed and dried it according to instructions. Still smelled. So washed it again in warm water and dried low heat. Still smelled. So washed it again in hot water with baking soda added to the detergent. Still smells but the smell is much less. The good. It is puffy and had no problem with a hot water wash with baking soda. It seems very well made. I am currently airing it out to see if I want to keep it. The smell seems concentrated in the bed skirt portion. The cotton top seems fine, as does the filling. The polyester backing originally had a strong odor but it is less apparent now. In the mean time I'm ordering another product in hopes of an all cotton mattress pad that has no odor.

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