Heerenveen welcomes Effektief as new main sponsor. From the 2026-2027 season, the name of the cleaning specialist will appear on the front of the club's shirt. Both parties confirm their long-term partnership, based on regional involvement, continuous development, and sustainable growth. A one-year agreement has been signed with the option to extend. The goal is a long-term partnership. Effektief is a nationwide operating cleaning company that has its roots in the north of the Netherlands. The company has grown into a top-10 player in the Dutch cleaning industry and works for clients in education, care, government, industry, and events. Effektief supports hundreds of clients daily throughout the Netherlands and has a strong focus on development, entrepreneurship, and attention for people. The company has the ambition to continue growing and innovating. This fits perfectly with what Heerenveen strives for. Talent development and the ambition to continuously improve and move forward unite the two organizations. The partnership between Effektief and Heerenveen has a rich history and has been visible in various ways over the years. As a Business Partner, the company contributes to the development of the club, while it also plays a significant role as an official cleaning partner daily in and around the Abe Lenstra stadium. Effektief has also had a prominent place on Heerenveen's jersey over the years. Between 2020 and 2025, the company was visible on the back of the Pompeblêdenshirt. Last season, the logo appeared on the sleeve of the jersey. Martin Koopman, commercial manager Heerenveen: "With Effektief, we get a committed and ambitious partner on the shirt that fits well with what Heerenveen stands for. We have already had a long-term partnership, and it's great that we've found each other in this main sponsorship. We find each other in the strong bond with the region and the conviction that development and quality are the basis for success. This partnership goes beyond just visibility. We want to make an impact together in the region." Remko Stolk, general manager Effektief: "We are proud to be on Heerenveen's shirt next season. It highlights our bond with the northern region and football even more. We now support all northern Eredivisie clubs, which is very special. Our partnership with Heerenveen goes back a long way. Our employees have been ensuring that the Abe Lenstra stadium is clean when the supporters enter for years. Invisible, skilled, and proud. With this main sponsorship, we make their work visible. They also think it's great that we're now at the front of the shirt."