Direct-to-film (DTF) is the most popular printing process for printing garments. It is used for printing attractive designs and logos on t-shirts, tops, jeans, and other outfits. The sportswear you see sportsmen wearing during championship matches is printed with. The process involves the use of a specific type of DTF ink that makes the prints long-lasting.
Source:- https://www.storeboard.com/blogs/technology/understanding-the-properties-and-benefits-of-dtf-ink/5742626