What is unique about clothing made of polyester?

Polyester clothing does not make you sweat when you wear it.

Explanation: Polyester is a synthetic fabric that is designed to wick moisture away from the body, helping to keep the wearer dry and comfortable. It is commonly used in activewear for this reason. While it can retain odors, proper washing usually helps eliminate them, so the statement about smelling bad even after washing is misleading.