These METFUIN long sleeve t-shirts are made of 100% polyester, which is soft, lightweight, and has good breathability. The sublimation transfer printing technology allows for full color and high resolution prints, making your designs come to life with vibrant colors and sharp details. The shirts are suitable for various occasions, such as sports events, parties, business meetings, and more. They are easy to care for and can be washed in cold water and dried in a dryer. The sublimation transfer printing technology ensures that the colors of the shirts will not fade or peel off after washing, making them long-lasting and durable. The METFUIN long sleeve t-shirts are perfect for sublimation heat press machines, and can be used to create personalized designs for a wide range of products, such as t-shirts, hats, bags, cups, and more.