Can Certain Fabrics Pick Up Smells?

[smokingGun]

anything poly can absorb smells, even high-priced technical running/biking sportswear. That's why many athletes have switched to micro-woolens like SmartWool and Ibex.

[Geneyus]

I wear workout-type polyester shirts every day under my work gear. Some of them never smell fresh even though I put in plenty of soap and select "extra wash" or "extra rinse" on the washer. I've read online that polyester loves harboring mold and mildew, and when it gets sweaty again, hello bad smell.