Show everyone who you root for with the Nike Kids' San Francisco 49ers Rivalries T-Shirt. Featuring San Francisco 49ers graphics and colors, you’ll be ready to cheer your favorite NFL team to victory. Whether you’re heading to the game or just want to show off your favorite team, this San Francisco 49ers top will leave no doubt where your loyalty lies. Wear your team’s colors and show off your pride with the Nike Kids' San Francisco 49ers Rivalries T-Shirt.