Advertising is prohibited on the chest of NBA, which was also formulated by NBA President david stern. Stern abides by the "family law" of jerseys without advertising, and has created a quite pure image for the league. During his tenure, this "family law" was made stricter. Before 2002, clothing trademarks were allowed on jerseys, and even this was not allowed after that. . The jersey sponsor used to be Reebok. Later, when Adidas bought Reebok, the sponsorship of NBA jerseys was transferred to Adidas. The advertisement on the chest of NBA training suit was temporarily lifted. For example, PNY printed its own advertisement on the tennis team's training clothes.