When sourcing tights, the material composition is the most critical factor for durability and comfort. Look for a blend of Nylon (Polyamide) and Spandex (Elastane). For standard hosiery, a Spandex content of 10-20% ensures excellent elasticity and shape retention. For athletic or compression tights, prioritize interlock knitting techniques and moisture-wicking finishes to enhance performance. Always verify the Denier (D) count, which indicates thickness: 8-15D for sheer, 40-70D for semi-opaque, and above 80D for opaque winter styles.