Performance fabrics are engineered for specific functional outcomes: moisture wicking, UV protection, wind resistance, stretch, odour control. Common in activewear, outdoor, and travel collections. Base technologies: polyester microfibre, merino wool, nylon ripstop, polypropylene, and elastane blends. Often treated with DWR (Durable Water Repellency) or silver-ion antimicrobial finishes. Premium performance fabrics now target business-casual contexts (travel blazers, commuter chinos).