Long Sleeve T‑Shirts Gildan G5400 Adult Unisex 5.3 oz Heavy Cotton (8 Colors Available) - 5045. The Gildan 5400 is a heavy cotton long-sleeve t-shirt made of 100% cotton with double-needle stitching on the neck, sleeves, and bottom hem. It is quarter-turned with a taped neck and shoulders. Weight: 5.3 oz. Pre-shrunk 100% cotton. Ash is 99/1 cotton/polyester and sport grey is 90/10 cotton/polyester. Neon green & neon orange are 50% cotton/50%polyester. Double-needle stitched neckline, bottom hem, and sleeves Colors available: neon safety green, neon safety orange, white, black, red, royal blue, ash & sport gray.