Elastic Textile Yarn segmentation by application reveals four primary demand clusters: sportswear, medical, fashion apparel, and industrial. Sportswear accounts for the largest share, driven by high‑performance garments that require stretch recovery and moisture management; its growth is linked to rising athleisure adoption, contributing roughly 35 % of total market revenue. The medical segment, representing about 20 %, is anchored in compression therapy, wound‑care dressings, and prosthetic liners where controlled elasticity enhances patient outcomes. Fashion apparel holds a 30 % share, reflecting designers’ preference for form‑fitting silhouettes and stretch‑denim that combine comfort with aesthetic flexibility. The industrial niche, comprising the remaining 15 %, includes elastic yarns for automotive interiors, filtration media, and protective equipment, where durability and resistance to environmental stressors are paramount. Collectively, these application categories define the Elastic Textile Yarn market size, with each segment’s pricing power and volume demand shaping overall growth trajectories. The relative profitability of each cluster also influences manufacturers’ investment decisions and supply‑chain allocation.