When evaluating Chenille thread, you must focus on the yarn count (Nm) and the pile length. For high-quality textiles, a count of Nm 1 to Nm 10 is standard. Ensure the core yarn (usually two strands of high-tenacity polyester or acrylic) is tightly twisted to prevent pile loss or shedding, which is the most common quality defect. Additionally, verify the composition ratio (e.g., 100% Polyester, Acrylic/Polyester blends, or Viscose) as this directly impacts the hand-feel, luster, and durability of the final fabric.