Recycled polyamide is often sourced from post-industrial nylon waste and, in some systems, recovered fishing nets or other nylon products. Major production and regeneration occurs across Europe and Asia, depending on the recycler and supply chain. Challenges include verifying true feedstock origin, controlling chemical processing impacts, and managing microfiber shedding during washing. GRS can verify recycled content and chain-of-custody; branded systems (like ECONYL®) add additional traceability frameworks when explicitly named. Recycled polyamide is used in activewear, swimwear, hosiery, and accessories.