When sourcing wedding attire, prioritize fabrics like Mulberry silk, high-density bridal satin (395 satin), and French lace. Ensure the GSM (Grams per Square Meter) is appropriate for the silhouette; for example, structured ball gowns require a higher GSM for volume. Verify that the supplier uses YKK zippers and reinforced boning (at least 8-12 pieces for bodices) to ensure structural integrity and a premium fit. Always check for colorfastness to light and perspiration (Grade 4 or higher) to prevent discoloration during events.