Why is polyester bad?
Polyester is a man-made fibre. The material is warm and has no absorbancy. Hence is no good for a garment of regular use.
A regular garment should be stretchable and sweat absorbent. It should not be heat resistant or water resistant. Polyester does not stretch, does not absorb sweat, does not breathe. Hence if you wear a polyester garment, you sweat immediately, feel very hot.
Besides the above factors, there is electrical reaction between the polyester and the warm of the body. There remains air between the hair in our skin and this air makes some sort of electric reaction with the polyester garment which is not good for the skin and for our health. This is called static electricity.
Polyester clothes contain toxins like formaldehyde, brominated flame retardants, and fluoridated chemicals (Teflon) to provide "non-iron" and "non-wrinkle" qualities.
When you wear a polyester garment, skin and the fabric interact… creating problems like infertility, respiratory diseases, contact dermatitis, and cancer.
The more synthetic clothing you wear like polyester, the greater your risk of absorbing toxic chemicals that harm your health.
Polyesterl fibers restrict and suffocate your skin — shutting down toxic release. Meanwhile, they contribute to your total toxic burden and may become the "tipping point" for triggering the onset of disease.
Two contributing factors are (1) toxic buildup in your body and (2) multiple chemicals that interact together to create even worse problems than the individual chemicals by themselves.
Skin rashes, nausea, fatigue, burning, itching, headaches, and difficulty breathing are all associated with chemical sensitivity. If you have mysterious health symptoms that you can't seem to get control over, it's worth checking out whether your clothes could be the problem.