Selecting the appropriate material is critical for durability and comfort. For high-end fashion, Acetate (Cellulose Acetate) is preferred as it allows for deep colors and patterns; ensure it is hand-polished for a premium finish. For lightweight and flexible options, TR-90 (Thermoplastic) is ideal for sports-fashion hybrids. If sourcing metal frames, prioritize Monel or Titanium to ensure they are corrosion-resistant and hypoallergenic, especially for markets with strict skin-contact regulations.