When sourcing long fringe dresses, the fringe material is paramount; look for high-density rayon or silk-polyester blends to ensure a smooth drape and prevent tangling. The base fabric should ideally be a high-elasticity spandex blend (e.g., 5-10% spandex) for performance wear like Latin dance, or a heavyweight polyester crepe for evening wear to support the weight of the fringe. Ensure the fringe density is sufficient to prevent 'gaps' when moving, typically requiring multi-layered rows or a minimum weight of 300-500g per garment depending on length.