When sourcing flock powder, you must prioritize material type (Nylon, Viscose, or Polyester) based on your application. Nylon is preferred for its superior abrasion resistance and elasticity, making it ideal for automotive interiors and apparel. Viscose (Rayon) offers a softer touch and better color brilliance, suitable for packaging and decorative crafts. Additionally, verify the denier (thickness) and cut length (usually 0.5mm to 3.0mm); a uniform cut length is critical to achieving a smooth, velvet-like finish without clumping.