Gildan G5000 Adult Unisex 5.3 oz. HD Heavy Cotton™ Blank T-Shirts (22 Colors) - 4974. Model g500 - cotton: 100% - weight: 5.3 oz - sizes s, m, l, xl, 2xl. The Gildan 500 is a heavy cotton t-shirt made of 100% cotton. Very comfortable to wear with double-needle stitching on the neckline, bottom hem, and sleeves. Features: Weight: 5.3 oz. Pre-shrunk 100% cotton. Double-needle stitched hemmed sleeves and bottom. Double-needle stitching throughout. Taped shoulder-to-shoulder. Seamless rib at neck. Heather colors and neon colors are 50/50 material. Fiber content varies by color: Ash grey is 99% cotton and 1% polyester.