The differences between a 400g heavyweight pure cotton T-shirt and an ordinary T-shirt are significant: • Texture and Fit: Heavyweight ones have a high gram weight, with thick and stiff fabric that is not easy to deform and has good drape, creating a neat silhouette. Ordinary T-shirts tend to be limp and baggy. • Durability: The cotton fibers of heavyweight T-shirts are denser, resistant to pilling and abrasion, and durable for washing and wearing. Ordinary ones are prone to damage and deformation after multiple washes. • Wearing Experience: Although thick, they are breathable and sweat-absorbent, not stuffy in summer, and can also provide moderate warmth, suitable for single wear in spring and autumn. Ordinary T-shirts are thin, with poor warmth retention and are easy to be see-through. • Detailed Craftsmanship: Heavyweight T-shirts mostly adopt fine craftsmanship such as double-needle stitching, making details like necklines and cuffs more firm. The craftsmanship of ordinary ones is relatively simple, and details are easily damaged.