Choose a Mitchell & Ness Legacy Jersey for your official NFL throwback. These versatile Jerseys shouldn't be limited to game-day wear, with their tough polyester construction making them perfect for layering whilst being lightweight enough to be worn on their own. Based in the Bay Area, the 49ers were founded in '46 before joining the NFL in '49. The name comes from the men who arrived in Northern California during the 1849 Gold Rush. The 49ers are known as "The Team of the '80's" due to 4 Super Bowl victories.