Polyester and polyester-rich blends are a popular choice for apparel, including sportswear and activewear. The challenge for manufacturers is to find ways to overcome the thorny issue of permastink byemploying either antimicrobial treatment or odor capture technologies. This article discusses the problem of odor control in polyester and polyester-rich blends, and describes a novel metal-free technology that can provide a more sustainable solution to address this concern.