One luxury Italian brand known for its premium cotton t-shirts is "Emporio Armani." Emporio Armani, a subsidiary of the renowned fashion brand Giorgio Armani, offers a range of high-quality apparel, including cotton t-shirts known for their craftsmanship, style, and attention to detail. Other luxury Italian brands that are renowned for their premium cotton t-shirts include Versace, Dolce & Gabbana, Gucci, and Prada. These brands are celebrated for their use of luxurious fabrics, exquisite designs, and impeccable craftsmanship in their clothing collections.