This is very interesting info. I can't use feather pillows due to allergies, but have noticed headaches and stuffy nose and rosacea much more at our main house, not second one. I'm going to check fabric content of bed stuff. I did get a pillow which was advertised on tv that had some kind of pellets. Was supposed to help people with neck problems. It does help and is kind of horseshoe shaped. I don't remember the brand and am not at home for a week, so I can't check.