When sourcing woven shirts, the fabric construction is the most critical factor. You should prioritize long-staple cotton (like Pima or Egyptian) for premium lines or cotton-poly blends for cost-effective, wrinkle-resistant options. Pay close attention to the yarn count (e.g., 80s/2 or 100s/2); higher counts indicate a finer, softer fabric. Additionally, verify the fabric weight (GSM) to ensure it matches the intended season—typically 110-130 GSM for summer shirts and 140-170 GSM for flannels or workwear.