The San Francisco 49ers have new uniforms that will be revealed August 28. If you don’t believe me, just ask the 49ers’ social media team. An August 28 reveal is the extent of the information any fan or uniform enthusiast needs to know about the new threads that will be debuted as part of a “Rivalries” uniform set to be worn against the Seattle Seahawks in the season finale at Levi’s Stadium. The rest of the division and the AFC East will also add the additional alternate uniform.