... polylon yarn and eco-friendly dye stuff.2. High Tensile Strength, Good impact resistance and not easy to fracture3. Good ... leotards, lycra shorts, lycra tights, swimming goggles, underwear.Testing: we own testile strength testing instrument. 3. Others1. Package: by rolls, in plastic ... and regular technics trainnings.4. Complete set of the testing machines and 12 QC specialists.5. Warm customer service ...