The pillow covers are noisy. They are shiny on the inside. Are they treated with anything to make them dust mite proof? I am rating these pillow covers 4 stars because of the noise they make. I can live with the noise if it comes from the fact that the fabric is very very tightly woven. But I hope that they are made of simply 100% cotton thread and nothing else is added or sprayed on the fabric to make it dust mite proof. The product I received is made in China by Bargoose Home Textiles.