When evaluating quality, focus on the base fabric material (typically nylon mesh, organza, or water-soluble milk silk) and the thread type (polyester, cotton, or metallic). Ensure the stitch density is high enough to prevent the heart patterns from fraying. For high-end garments, prioritize chemical lace (guipure) which offers a three-dimensional effect, or tulle lace for a lightweight, romantic feel. Always verify the effective width (usually 130cm-150cm) and the repeat pattern size to ensure it aligns with your garment cutting markers.