When sourcing garment cloth, you must prioritize Fabric Weight (GSM), Thread Count, and Composition. For high-end apparel, ensure a consistent GSM (Grams per Square Meter) to maintain drape and durability. For cotton fabrics, a thread count of 300 or higher is preferred for a premium feel. Additionally, verify the Colorfastness Rating (Grade 4-5) to ensure the fabric does not bleed or fade after multiple washes, and check the Shrinkage Rate, which should ideally be less than 3% for woven fabrics.