T-Shirts by Gildan. Details:Gildan’s G5400 Adult Heavy Cotton Long Sleeve T-Shirt gives you great your round coverage.S cotton, it features a classic fit and rib knit cuffs. It can be worn for any casual occasion or dress it up with a vest or blazer. This comfortable fabric can be decorated with just about any ink or paint, embroidery, iron-on transfers, bleaching and tie dye.