When purchasing hoodies in bulk, the GSM (Grams per Square Meter) is the most critical indicator of quality; a standard mid-weight hoodie is typically 280-320 GSM, while heavyweight premium options exceed 350-400 GSM. You must also specify the material blend, such as 80% Cotton / 20% Polyester for a balance of comfort and reduced shrinkage, or 100% Organic Cotton for eco-conscious branding. Additionally, verify the fleece type (e.g., brushed fleece for warmth or French Terry for breathability) to match your target market's climate.