When sourcing wholesale pure cotton, you must prioritize Yarn Count (e.g., 40s, 60s, 80s) and Thread Count, as these directly determine the fabric's fineness and durability. Higher yarn counts indicate a finer, smoother texture. Additionally, verify the Fabric Weight (GSM - Grams per Square Meter) to ensure it matches your specific application, such as lightweight for shirts (100-130 GSM) or heavier for trousers and home textiles. Always request Colorfastness ratings (Grade 4 or higher) to ensure the fabric resists fading during washing and light exposure.