The Recycled Polyester Yarn market is defined as the industry that produces yarns made from post-consumer plastic waste, primarily polyethylene terephthalate (PET) bottles. As the world shifts towards a more circular economy, the Recycled Polyester Yarn market size is estimated to be around $8.5 billion in 2025. The growth outlook for this market is promising, with a market forecast that expects significant expansion over the next few years. The industry expansion is driven by increasing demand for sustainable textiles, government regulations, and technological advancements. The primary keywords that define this market include recycled polyester yarn, sustainable textiles, and circular economy. The scope of this market encompasses various types of recycled polyester yarns, including PET, polybutylene terephthalate (PBT), and polytrimethylene terephthalate (PTT), which are used in a wide range of applications such as apparel, upholstery, and industrial textiles.