When sourcing hoodies, the GSM (Grams per Square Meter) is the most critical indicator of thickness and quality; for premium streetwear, look for 300-400 GSM, while promotional items typically range from 240-280 GSM. Material composition is equally vital—100% Cotton offers the best breathability and premium feel, whereas CVC (Chief Value Cotton) or Cotton-Polyester blends (e.g., 80/20) provide better durability, less shrinkage, and are more cost-effective for bulk orders. Additionally, verify the fabric type, such as French Terry for a lighter feel or Brushed Fleece for maximum warmth and softness.