The DSV, the German swimming federation, has signed up Arena, the international swimming brand, as a premium partner.
Arena becomes an official supplier to the DSV, equipping Germany's top swimmers, but will also work closely with the national federation to get more people involved in the sport.
Christa Thiel, president of the DSV, said: "The focus is on the promotion of the whole sport of swimming, from the performance to the recreational level."
Earlier this year, Arena signed a four-year sponsorship deal with FIN, the Italian swimming federation.
It also has deals in place with the national swimming federations of USA, Russia, Hungary and the Netherlands.