When sourcing branded apparel like Levis, authenticity is the top priority. Ensure the supplier provides a Letter of Authorization (LOA) or a Trademark Authorization to prove they are an authorized distributor. For quality, check the denim weight (typically 12-14 oz for standard styles), the presence of branded copper rivets, the Two Horse Pull leather patch, and the Red Tab with distinct stitching. Request third-party inspection reports (e.g., SGS or Intertek) to verify colorfastness, shrinkage rates, and fabric composition (e.g., 98% cotton, 2% elastane).